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  2. Distances Between Ports - Wikipedia

    en.wikipedia.org/wiki/Distances_Between_Ports

    The front cover of Distances Between Ports. Distances Between Ports (PUB 151) is a publication that lists the distances between major ports. Reciprocal distances between two ports may differ due to the different routes of currents and climatic conditions chosen.

  3. Under keel clearance - Wikipedia

    en.wikipedia.org/wiki/Under_keel_clearance

    For US waters, the US Code of Federal Regulations require ships and their masters to calculate UKC based on the ship's deepest navigational draft. 33 CFR 157.450 The regulations require the master to discuss the UKC calculation with the maritime pilot as the ship approaches US ports/waters. 33 CFR 157.450

  4. Nautical measured mile - Wikipedia

    en.wikipedia.org/wiki/Nautical_measured_mile

    A nautical measured mile is a nautical mile which is marked by two pairs of towers. A mile is measured by sailing on a given bearing and lining up the pairs of towers. The start of the mile is recorded when the first pair of towers line up and the end of the mile recorded when the second pair line up.

  5. List of nautical units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_nautical_units_of...

    Nautical mile: Length: Rhumb: Angle: The angle between two successive points of the thirty-two point compass (11 degrees 15 minutes) (rare) [1] Shackle: Length: Before 1949, 12.5 fathoms; later 15 fathoms. [2] Toise: Length: Toise was also used for measures of area and volume Twenty-foot equivalent unit or TEU: Volume: Used in connection with ...

  6. United Kingdom Hydrographic Office - Wikipedia

    en.wikipedia.org/wiki/United_Kingdom...

    The United Kingdom Hydrographic Office (UKHO) is the UK's agency for providing hydrographic and marine geospatial data to mariners and maritime organisations across the world. The UKHO is a trading fund of the Ministry of Defence (MoD) and is located in Taunton , Somerset , with a workforce of approximately 900 staff.

  7. Admiralty chart - Wikipedia

    en.wikipedia.org/wiki/Admiralty_chart

    The range also includes Admiralty Raster Chart Service (ARCS), which allows paper nautical charts to be viewed in raster form on an ECDIS. [ 28 ] Due to the changing nature of the seabed and other charted features, chart information must be up-to-date to maintain accuracy and general safety.

  8. Set and drift - Wikipedia

    en.wikipedia.org/wiki/Set_and_drift

    Step 5. Measure length of course by using speed of 8.8 knots and converting into nautical miles via the time, speed, and distance scale; Step 6. Connect the two ends of the vectors from the current course to the course made good. Thus creating your set and drift vector; Step 7. Using the navigational triangle, place on set and drift vector.

  9. Sailing Directions - Wikipedia

    en.wikipedia.org/wiki/Sailing_Directions

    The oldest sailing directions, dating back to the middle ages, descended directly from the Greek and Roman periplii: in classical times, in the absence of real nautical charts, navigation was carried out using books that described the coast, not necessarily intended for navigation, but more often consisting of reports of previous voyages, or celebrations of the deeds of leaders or rulers.