An elevation profile will appear in the the lower half of the 3D Viewer. The routes selected by the author are suitable for boats up to 48 inches draft. You can also compare door-to-door distances and carbon footprint between different shipping routes. Each coastal State may claim a territorial sea that extends seaward up to 12 nautical miles (nm) from its baselines. Marine Online is a B2B e-commerce platform for shipping services including chartering, getting bunker price, ship supply, port agency, crewing, ship sale and purchase, marine services & finding marine suppliers. The distance between Nashville (Nashville International Airport) and Seattle (Seattle–Tacoma International Airport) is 1978 miles / 3183 kilometers / 1719 nautical miles. Vessel Tracking (AIS) Weather. What’s the distance to Southend-on-Sea from South Ockendon? The average trip from South Ockendon to Southend-on-Sea using Uber is about 38 kilometers. Voyage Planner The MarineTraffic Voyage Planner is a novel tool for sea route distance calculation. 00 m c. The displacement and the speed of the vessel, combined, indicate the momentum of the vessel. The calculation of cruising distances were determined from NOAA and Canadian Hydrographic Service digital charts in BSB format using the Fugawi Marine ENC™ navigation application. As dimension for the speed, knots (kn) is used, one knot is one nautical mile per hour. The driving distance from Atlanta (ATL) to Seattle (SEA) is 2680 miles / 4313 kilometers, and travel time by car is about 47 hours 20 minutes. Straits Canals Gulfs Bays Seas Oceans Rivers Lakes Sounds Fjords Reefs Lagoons Capes. Midpoint: 46. results may be rounded. Dispersal shapes marine biodiversity, and must be understood if marine systems are to be well managed. All Fatalities in this guide are written assuming you're facing right. A nautical mile is slightly longer than a mile on land, equaling 1. The driving distance from Seattle (SEA) to Sacramento (SMF) is 732 miles / 1178 kilometers, and travel time by car is about 14 hours 4 minutes. Submit. The driving distance from Seattle (SEA) to Philadelphia (PHL) is 2807 miles / 4517 kilometers, and travel time by car is about 50 hours 21 minutes. Variants amounts to 16 days ‐ 22 hours ‐ 50 minutes, with comprising southern traffic flow (both types of distance of 8 543. Some whales and dolphins use echolocation to locate food. 1 billion distance data with (S)ECA, Weather Forecast, Piracy Alert and many other powerful functions. 30 120 12. net utilizes Sea Distance Calculator from port to port, Nautical Chart, Interactive map of the major 300 rivers, seas and ocean objects and regions, Maritime Locator useful to spot, find out and contact Shipyards, Agents, Ship Suppliers, Bunkerers and nearby Sea Ports in the. It will also display local time in each of the locations. The coastal State exercises sovereignty over its territorial sea, the airspace. We have developed custom routing algorithms, and leverage. Result page displays distance in miles, kilometers and nautical miles along with an interactive map showing travel direction. Searoutes is committed to making freight transportation and decarbonation work together for a greener and more sustainable international trade. MM) or degrees, minutes, and decimal seconds (DD:MM:SS. Sea Distance Calculator. Distances: From Ebey's Landing State Park Trailhead - 3. North Atlantic Ocean » 6. The distance d in miles (mi) is equal to the distance d in nautical miles (Nm) times 1. 600' S, 27° 54. We tested different methods for the distance calculations and decided to use Edit Distance with Real Penalty (ERP) [5]. Analyse your emissions and distance of your container shipments on a. 5°5'E (2015) ANNUAL DECREASE 8' Edit. This map gallery offers a glimpse into the discoveries of a decade 's investigation into life in all ocean realms from microbes to whales. The distance between Seattle (Seattle–Tacoma International Airport) and Charleston (Charleston International Airport) is 2415 miles / 3886 kilometers / 2098 nautical miles. Seametrix uses the most sophisticated calculating algorithms,. The routes selected by the author are suitable for boats up to 48 inches draft. This route is called a geodesic or great circle. SOFAR is an ocean 'channel' that allows sound to carry great distances. Inouye International Airport – Seattle–Tacoma International Airport) is 2677 miles / 4308 kilometers / 2326 nautical miles. Locate Ships by Geo Coordinates. Popular distances from Seattle (SEA) Distance from Seattle to Paris (Seattle–Tacoma International Airport – Paris Charles de Gaulle Airport) is 5016 miles / 8073 kilometers / 4359 nautical miles. The nautical mile, on the other hand, is mostly used for sea and air navigation. noaa. In theory, this could be stretched further if you reduce your speed or find some good winds along your route. Transmate's free ocean distance calculator is an invaluable tool for professionals in the freight and logistics industry. One minute of latitude is defined as one nautical mile (1. Example 12 . In the Distance calculator, enter the speed value and conversion units. The driving distance from Seattle (SEA) to Nashville (BNA) is 2431 miles / 3913 kilometers, and travel time by car is about 42 hours 31 minutes. Provide the distance in miles, kilometers, or any other unit, and the result of the conversion will show up instantly. Sea+InlandRouting Get the most accurate distances to better predict arrival times, monitor fuel consumption, estimate Co2, compute deviation costs. Select limit or boundary for specific information. All available through a secure, unified and easy to use RESTful web service. Calculate the total nautical distance of your sea voyage with ease. Web Applications. 852 kilometres (km) one nautical mile (nmi) = 1. is also used by all nations for air and sea travel. The database currently holds more than 9,500 ports and maritime locations, and more than 83,000 waypoints contribute to the accuracy of the calculation. Get information on size, coordinates, restrictions, water depth, distances, and routes at SeaRates. nautical units. Open Google Earth Pro. 852 kilometers. Port of San Francisco. Distance and route computation. Get API Keys Contact us Get point to point, port to point and port to port sea routes and sea distances. e. The time it takes to travel 100 miles on a boat depends on the boat’s speed. Ocean distances & insights in logistics operations. Speed = 30/40 = 0. Distances from SEA. Amman to Dead Sea by Rental Car. This mileage calculator estimates the number of driving miles between two locations in the United States. My suggested method for visiting the Dead Sea from Amman is to rent a car and drive yourself there. It will also display local time in each of the locations. 52 mi (1,943. 852 kilometers). org has an invalid. Shows the distance from Seattle to the North Pole, Equator, South Pole and any place in the world. ORG All Rights Reserved. Includes air line, route, centre, route planner, flight route and interactive map. Port of Skikda » 2. In the Time calculator, enter the distance value and conversion units designation. First zoom in, or enter the address of your starting point. By plugging in your specific. Abbreviation: mi. 151) publication contains tabulated distances between departure ports, junction points, and arrival ports worldwide, organized alphabetically. MM) or degrees, minutes, and decimal seconds. Weather; Sea Marks; Harbours; Sport; Aerial photo; Coordinate Grid Ocean distances & insights in logistics operations Transmate's free ocean distance calculator is an invaluable tool for professionals in the freight and logistics industry. From New. SeaRates improves Distance&Time with data from ports and locations around the world. A nautical knot is a unit of speed equal to one nautical mile per hour (1 knot = 1. Mediterranean Sea » 3. It is approximately one minute of arc measured along any meridian. , stating their geographical coordinates by latitude and longitude around the world. R is the radius of Earth (approximately 6,371 kilometers) h denotes your height above sea level. Nautical Miles (M, NM, or nmi) - Length / Distance Conversions. CLEAR Plus lanes are located in the following terminal(s): Checkpoint 1; Checkpoint 2; Checkpoint 3; Checkpoint 4; Checkpoint 5; If you are unsure of when to leave for the airport, you can check wait times at SEA. Seattle–Tacoma International Airport – Boise Airport. Boatbookings have created the leading online yacht charter route planner, distance and fuel calculator, so you can see your exact cruising plan and itinerary in unrivalled detail. 700 km / 29 travel days = 24 km per day (14 miles per day). What is a mile (mi)? Port distances. Alboran Sea » 4. 449 47° 26' 56. Distance & Time Shipping Calculator. It is important to estimate transit times for various routes to any location in the world for both consignees and shippers. Searates is Leading International Digital Freight Marketplace with the powerful Network of Independent Freight Forwarders. port distances, port distances table, port distances software, international port distances, mediterranean port distances, port distance by sea, shipping distances by sea, port distances calculator, port distances. 1508 statute miles or 1852 meters when measured on land. Distance to Duration Costs while en Duration of Description of actions taken (e. The distance will be calculated then displayed below the map in miles or kilometers. 004:. Port to Port, Point to Port or Point to Point. The calculation of cruising distances were determined from NOAA and Canadian Hydrographic Service digital charts in BSB format using the Fugawi Marine ENC™ navigation application. Calculate the total nautical distance of your sea voyage with ease. To find the distance between two places, enter the start and end destination and this distance calculator will give you complete distance information. com can calculate the shortest distance and the fastest distance between any two cities or locations. Average speed: POL: POD: Distance and Time - Online tool for calculation distances between air and sea ports. A nautical mile is 1,852 meters or 1. Sea+InlandRouting Get the most accurate distances to better predict arrival times, monitor fuel consumption, estimate Co2, compute deviation costs. This is composed of three sections to do classic Time, Speed and Distance calculations. Latitudes and longitudes may be entered in any of three different formats, decimal degrees (DD. To find speed, time or distance, enter a value in two of the three fields, and the third will be calculated for you. Our easy-to-use distance calculator gives approximate berth-to-berth distances between member ports themselves and also between member ports and some key regional ports. Caribbean Sea » 7. To find speed, time or distance, enter a value in two of the three fields, and the third will be calculated for you. 4. The distance between Newark (New York Newark Liberty International Airport) and Seattle (Seattle–Tacoma International Airport) is 2402 miles / 3865 kilometers / 2087 nautical miles. To find the speed of a vessel on a measured nautical mile in a given number of minutes and seconds of time, enter the time in total seconds (i. To find the speed of a vessel on a measured nautical mile in a given number of minutes and seconds of time, enter the time in total seconds (i. Do you need to know the distances between ports for your maritime navigation? Download the Pub. Distance and route computation. Published 29/08/2017 at 256 × 256 in port distance tables. Similar to sonar systems on ships, some whales use sound to detect, localize, and characterize objects. . 2 1. It covers a broad thematic element of history that often uses a global approach, although national and regional histories remain predominant. 15. A straight line is the shortest possible measure of the distance between two locations. Knots are used to measure speed. Latitudes and longitudes may be entered in any of three different formats, decimal degrees (DD. How to find the flight distance between two places? To find the flight distance between two places, please insert the locations in the control of flight distance calculator and Calculate Flight Distance to get the required results while travelling by air. Popular distances from Seattle (SEA) Distance from Seattle to Tokyo (Seattle–Tacoma International Airport – Narita International Airport) is 4769 miles / 7675 kilometers / 4144 nautical miles. Sea-SeekDistance Calculator. distances, find the departure port in the alphabetical listing and select the desired arrival port and distance listed below. Strait Of Gibraltar » 5. Each port and waypoint is carefully placed based on actual ship traffic and thorough analysis of routing options. Sailing Distance Calculating Tool with support for multiple locations. You can calculate the length of a path, running route, fence, border, or the perimeter of any object that. distancesfrom. The nautical mile (symbol nmi, M or NM) is a non-SI unit of length used in navigation (both marine and aerial). Tasman Sea. See also a map, estimated flight duration, carbon dioxide emissions and the time difference between Seattle and Dubai. We provide transparency and control, the cheapest price and the fastest. Planes travel along the shortest route in 3-dimensional space. To find the speed of a vessel on a measured nautical mile in a given number of minutes and seconds of time, enter the time in total seconds (i. A rental car in Jordan is about 25-30JD per day (depending on the car size etc) and once you are out of downtown Amman, it is highway driving from the 7th Circle in Amman to the Dead Sea. British Columbia Highway 99, also known as the Sea to Sky Highway, is the top world's scenic drive between Vancouver and Whistler in western Canada. As a responsible to all aspects of maritime deeds website shiptraffic. We found 1 solutions for Sea Distances: Abbr. Long viewed with superstitious awe by sailors, they spend most of their time gliding over the. 3 280. Straits Canals Gulfs Bays Seas Oceans Rivers Lakes Sounds Fjords Reefs Lagoons Capes. The strength of our navigational route network, lies in its thoroughness and distance accuracy. The Dataloy Distance Table is highly acclaimed for its extensiveness and accuracy. There are free data sets available for distances between ports: or msi. Others, called swells, which result from winds that blew somewhere else in the past, travel across the ocean surface. ) Nautical miles are most commonly used in navigating and charting. For example, if there is a barrier in the way, you have to detour. Container Lines ALL LINES MAERSK (332) CMA CGM (253) MSC (615) EVERGREEN (171) COSCO (129) APL (48) ONE (65) NYK (31) HAPAG LLOYD (107)679 TABLE 12 Distance of the Horizon Height Feet Nautical Miles Statute Miles Height meters Height Feet Nautical Miles Statute Miles Height meters 1 1. The distance between Seattle (Seattle–Tacoma International Airport) and Indianapolis (Indianapolis International Airport) is 1866 miles / 3003 kilometers / 1621 nautical miles. Reserve a ride in advance to Burnham-On-Sea and Highbridge. The surface is 680 ft. Searoutes CO 2 emissions calculator is an application to calculate your scope 3 emissions for all transport modes (sea, air, road, rail and barge). If you want to change the route on web; click and drag the route (same as you. All Rights Reserved. GEG Calculators is a comprehensive online platform that offers a wide range of calculators to cater to various needs. A straight line is the shortest possible measure of the distance between two locations. If your elevation measurement reads "0," make sure the terrain layer is turned on. 852. The routes are not generated by a computer algorithm. 000. My suggested method for visiting the Dead Sea from Amman is to rent a car and drive yourself there. 20,000 leagues would be equivalent to 60,000 nautical miles or. 86897583 nautical miles in a mile. A curated list of solutions, from basics such as Distance Tables and Vessel Tracking to Voyage. The Sea Marsh Building will be on your left at 351 Sea Island Road. a sea breeze. Formula. As a responsible to all aspects of maritime deeds website shiptraffic. Vancouver to Toronto distance (YVR–YYZ) Anchorage to Seattle distance (ANC–SEA) London to Sydney distance (LHR–SYD) Air Miles Calculator helps you calculate how many miles it is from one airport to another and. The geographic midpoint between JFK and SEA is in 1,207. Time Zones Map. Supplied by Veson Nautical, Sea-web Distance Tables offer a convenient tool to access millions of routes for voyage estimation and comparison. Enter the speed, fuel consumption, and fuel cost to determine the total cost of the trip. Get point to point, port to point, and port to port sea routes and sea distances. To sail to England or northern Britain in particular, it would take The Vikings about 3 to 6 days in good and favorable conditions at an average speed of 8 knots. It flows through much of Central and Southeastern Europe, from the Black Forest south into the Black Sea. There are 0. SS). 150779451. , particularly with respect to the use of data acquired by the Office of Coast Survey and its predecessors. Baselines are generally the coastline but straight baselines (closing lines) are drawn across the mouths of firths (estuaries) and some large. Typically the points are usually ports, but the routing. All distances refer to carry distance (distance until the ball first hits the ground) rather than total distance (carry and roll). 6km), roundtrip From the Prairie Overlook Trailhead - 5. 347. Searates provides Online Tool for Distance Calculation & Shipping Rates Between Air & Sea Ports. Distance from Honolulu to Seattle (Honolulu Daniel K. All Rights Reserved. Shore and Sea Boundaries summarizes the technical and legal aspects of determining maritime boundaries in the U. This is why pilots fly polar routes saving time and distance. The distance between San Diego (San Diego International Airport) and Seattle (Seattle–Tacoma International Airport) is 1050 miles / 1690 kilometers / 913 nautical miles. MarineTraffic Data is the ultimate source for port intelligence. 8 ft. Port Distance Calculator. Using knots for navigating nautical miles is more convenient than other statute distance units. In addition to using a chart, you can also use a nautical log, which is an instrument used to measure distances traveled by a boat over a given period of time. MarineTraffic Online Services enable you to monitor, review, analyse and plan shipping operations. As a responsible to all aspects of maritime deeds website shiptraffic. Find locations of ports and ships using the near Real Time ships map. Red Sea. Like other sea turtle species, hawksbills can migrate long distances between foraging areas and nesting beaches. The formula for determining how many miles an individual can see at higher levels is the square root of his altitude times 1. Using migration distances recorded for 407 adult and 4715 juvenile sea turtles across five species, we show that for adult cheloniid turtles, the upper ceiling on species migration distances between breeding and foraging habitats (1050–2850 km across species) is similar to that predicted for equivalent-sized marine mammals and fish. We aim at helping shippers, BCOs, forwarders and carriers identify the greener routes to reduce their transport carbon footprint, all modes. The driving distance from San Diego (SAN) to Seattle (SEA) is 1244 miles / 2002 kilometers, and travel time by car is about 23 hours 36 minutes. Get API Keys Contact us Get. We show ships current positions and marine traffic through the embedded maps of marinetraffic. A ship is traveling at a rate of 22 knots. Then draw a route by clicking on the starting point, followed by all the subsequent points you want to measure. Well, not completely. What is it: The limit to which Water Framework Directive measures have been implemented in Scotland. To locate themselves on the open ocean, navigators can determine their position by observing the Sun, Moon, stars, or planets. The driving distance from Houston (IAH) to Seattle (SEA) is 2331 miles / 3752 kilometers, and travel time by car is about 41 hours 22 minutes. Loggerhead populations in the United States declined due to bycatch in fishing. Freight transport by sea has been widely used throughout recorded history. Copyright © 2023 by SEA-DISTANCES. The symbol for nautical mile is M or NM or nmi. Notice The Difference Between Miles And Nautical Miles. The driving distance from Seattle (SEA) to Newark (EWR) is 2831 miles / 4556 kilometers, and travel time by car is about 50 hours 45 minutes. Edit routes to reflect seasonal constraints and user-specific requirements. 54). SEA DISTANCE CALCULATOR. In Macon, merge LEFT at I-16 East (Jim L. The Red Sea is the world’s northernmost tropical sea and is also one of the most heavily traveled waterways. 150-400 pounds. Air freight: hours to few days. g. Explore the slope, elevation, and distance along a path. Copyright © 2023 by SEA-DISTANCES. This is because one degree of latitude is approximately 69 statute miles in length. net utilizes Sea Distance Calculator from port to port, Nautical Chart, Interactive map of the major 300 rivers, seas and ocean objects and regions, Maritime Locator useful to spot, find out and contact Shipyards, Agents, Ship Suppliers, Bunkerers and nearby Sea Ports in the. VAR 3. Report illegal or suspicious activity to 1-800-853-1964, (808) 643-DLNR (3567), or the DLNRTip App. / 0°N 160°W / 0; -160. Here, from two values and units, the third value can be calculated. The three sides of a right triangle are then the legs, r and d, and the hypotenuse r + h. At sea level the curvature of the earth limits the range of vision to 2. t. ocean currents flow at the surface; others flow deep within water. The function VI03 -Port Distances and Routes will calculate distances between ports (simple response) and even provide a track (extended response). Seaway distances for tagged tuna using R; by Doug Beare; Last updated over 4 years ago; Hide Comments (–) Share Hide ToolbarsAs such, a nautical mile is actually slightly longer than the statute miles we use to measure a land mile. Seametrix is the only sea distance calculator that offers correct and real-world Rhumbline & Great-Circle nautical mile calculation results. Visual module with map, showing sea and land routings . A mile on the ground (sm) is 5,280 feet. Sea-web™ is the ultimate maritime reference tool, with more than 600 data fields on over 200,000 ships of 100 GT and above. also exists for planning, conducting and reporting sea trials [ISO 2005]. Email detailed photos and videos to RespectWildlife@noaa. Ships current position. Sea distances, terrestrial and satellite AIS data, weather data, forecasts and more from Aquaplot and trusted 3rd parties. World sea ports database, sea transportation, marine and ports market place, sea distances and routes. This distance is based on the customary international law principle of the territorial sea, which grants coastal states certain rights and jurisdiction over a defined area extending from their. The. In the Eastern Pacific, a group of green turtles that have darker shells are called. This is called echolocation. All Calculators. Select Measure distance. As a responsible to all aspects of maritime deeds website shiptraffic. They are equal to 1. A very quick sea route calculator showing you the distance in nautical miles from any of the vessels AIS position to any port. g. To find the speed of a vessel on a measured nautical mile in a given number of minutes and seconds of time, enter the time in total seconds (i. Environmental distance is a measure of the similarity in environmental conditions between two geographic locations. We have partnered with researchers and engineers to implement calculation methods and machine learning algorithms to calculate the real sea distances by combining historical and actual data, weather data and ship performance. Based on a review of data on species found at depths > 200 m, a PLD of 35 and 69 days ensures a minimum distance for 50% and 75%, respectively, of eurybathic and. Sea-Seek Distance Calculator Navigation tools. Kilometers. 1. Then draw a route by clicking on the starting point, followed by all the subsequent points you want to measure. Flight duration. Check Shipping Vessels Schedules By Routing, By Port, By Vessel, or By. The most likely answer for the clue is NMS. net utilizes Sea Distance Calculator from port to port, Nautical Chart, Interactive map of the major 300 rivers, seas and ocean objects and regions, Maritime Locator useful to spot, find out and contact Shipyards, Agents, Ship Suppliers, Bunkerers and nearby Sea Ports in the. This sea has a surface area of roughly 438,000 km 2 and is about 2,250 km in length. To measure distance on nautical charts, you will need a nautical ruler or dividers, which are specifically designed for use with charts. How To Use. What causes wind? differences in air pressure decreases in air temperature the occurrence of the Coriolis effect the even heating of Earth's. The distance between Seattle (Seattle–Tacoma International Airport) and Philadelphia (Philadelphia International Airport) is 2378 miles / 3827 kilometers / 2067 nautical miles. Understanding latitude and. Iso4app has been extended to manage marine. ABS provides this Guide to help its clients prepare for implementation of the IMO standards and application of the relevant procedures. The distance from the Ukrainian port city of Odesa to the Bosphorus Strait in the south is about 600 km (370 mi). Select points on the map below to plot your route. Port to Port Sea Distance Calculator. 4. Get API Keys Contact us Get point to point, port to point and port to port sea routes and sea distances. Because the Earth being an oblate (lens-like) spheroid, the length of a nautical mile is longest at the poles and shortest at the equator; see the article Ellipsoid for more details on oblate ellipsoids. The driving distance from Seattle (SEA) to Atlanta (ATL) is 2680 miles / 4313 kilometers, and travel time by car is about 47 hours 13 minutes. In the English measurement system, a nautical mile is 1. By plugging in your specific. Its magnitude makes it suitable for measuring large distances such as those between cities, countries or even. 852 kilometers (km) = 1852 meters. It’s easy. MarineTraffic Live Ships Map. Please select departure and arrival ports from the dropdowns. It is commonly used to measure the distance between places in the United States and United Kingdom. Includes air line, route, centre, route planner, flight route and interactive map. World sea ports database, sea transportation, marine and ports market place, sea distances and routes. How far is it? + + Distances from SEA #1 SEA Seattle Tacoma International Airport SeaTac, King County, Washington, United States of America . SEA Seattle Tacoma International Airport 10. To remove a point, click it. net utilizes Sea Distance Calculator from port to port, Nautical Chart, Interactive map of the major 300 rivers, seas and ocean objects and regions, Maritime Locator useful to spot, find out and contact Shipyards, Agents, Ship Suppliers, Bunkerers and nearby Sea Ports in the. Accurate routes, sea distances and transit times are key criteria for improved decision making. More than 4000 sea ports. Nautical miles. Copyright © 2023 by SEA-DISTANCES. In Iqirasik, Greenland, Abel Ludvigsen, stated the following in a 2014 interview with ICC: Back [in the 1940s and 50s] we would wait for the sea to freeze because when it froze the Mammals would come and when the fjords froze to ice then the mammals would come. Some seabirds travel very far distances, like the sooty shearwater, which GPS trackers have followed for more than 40,000 miles, figure-eighting across the. 539 96 nmi. The slope of the sea floor (or gradient) may be numerically expressed as a ratio, percentage, orAs a responsible to all aspects of maritime deeds website shiptraffic. nm = 4,775. Approximate Distances in nM (±5 ) Approximate Duration (non-stop, assumes an average speed of 6 knots) Iraklio : Chania : KapsáliThis site has a Forgotten Realms map that allows you to calculate distances between two points as the crow flies, or along a specific travel route (road or river) by using waypoints. Federal law has specific distance requirements for some species. Sea+InlandRouting Get the most accurate distances to better predict arrival times, monitor fuel consumption, estimate Co2, compute deviation costs. As a responsible to all aspects of maritime deeds website shiptraffic. to calculate the distance between trajectories using some measure; to clusterize trajectories based on their distances. The CERDI-SeaDistance database contains bilateral maritime distances between 227 countries and territories. One-Stop Maritime Applications. net utilizes Sea Distance Calculator from port to port, Nautical Chart, Interactive map of the major 300 rivers, seas and ocean objects and regions, Maritime Locator useful to spot, find out and contact Shipyards, Agents, Ship Suppliers, Bunkerers and nearby Sea Ports in the. , 90 = 1 min 30 sec), and the calculation will produce speed in knots. It is extremely accurate, especially for shorter distances. 12 ft 1 knot = 1 nautical mi/hr (exactly) a.