Nautical mile 1 sea mile", followed by "For most practical purposes distance is measured from the latitude scale, assuming that one minute of latitude equals one nautical mile". One tenth of a nautical mile is a cable length. The derived unit of speed is the knot, defined as one nautical mile per hour. The metre was originally defined as of the meridian arc from the North pole to the equator passing through Dunkirk. The Earth’s circumference is therefore approximately 40,000 km. The equatorial circumference is slightly longer than the polar circumference – the measurement based on this (40,075.017 km x x =
Nautical Archaeology Society Training programme. The Joan du Plat Taylor Award is a grant awarded annually by the Nautical Archaeology Society to support publication of nautical archaeological research. The grant was originally funded personally by Joan du Plat Taylor, the founder editor of "IJNA" and the first president of the Nautical Archaeology Society. The Adopt-a-wreck scheme, run by the Nautical Archaeology Society was set up as a joint initiative with the Maritime and Coastguard Agency to encourage groups and individuals to take a close interest in a maritime site, and adopt a minimum level of stewardship, monitoring how the site changes over time.