Enter marine-related query and AI bot will look for best match in our DB.
  1. A buried plate, wall, or block attached at some distance from and forming an anchorage for a retaining wall. Also known as anchorage; anchor block; anchor wall. 2. See anchor log.

Related Terms


  1. Having freedom of motion interfered with by collision or entanglement; entangled; the opposite of clear. For instance, a rope is foul when it does not run straight or smoothly, and an anchor is foul when it is caught on an obstruction.
  2. A breach of racing rules.
  3. An area of water treacherous to navigation due to many shallow obstructions such as reefs, sandbars, or many rocks, etc.
  4. Foul the range: To block another vessel from firing her guns at a target.


A signal placed at a distance from a block of track to give advance warning when the block is closed.


The ratio of length of anchor rode in use to the vertical distance from the bow of the vessel to the bottom of the water. Usually six to seven to one for calm weather and more scope in storm conditions.


Horizontal direction of a rhumb line, expressed as angular distance from a reference direction. Also called RHUMB DIRECTION.


A calibrated device for measuring the flow of liquids in open conduits by measuring the upper and lower beads at a specified distance from an obstructing sill.


A signal at the beginning of a block of railroad track that indicates whether the block is clear.


occurs when the cables are fouled in (Foul Hawse), when the ship has swung 360 degrees, an elbow is formed between the anchor cables.


A derrick having a vertical pole supported by guy ropes to which a boom is attached by rope or cable suspension at a distance the indications of the master gyro compass system.


The vertical distance from the molded baseline to the top of the freeboard deck beam at side, measured at midlength of the ship


An instrument in which the difference in pressure between two sources is determined from the vertical distance between the surfaces of a liquid in two legs of an erect or inverted U-shaped tube when each of the legs is connected to one of the sources.

Related questions

MarineProHelp 2018 - 2020

First time here? Check out the FAQ!

If you've arrived to new location and wonder how to dress comfortably according to weather, check Comfiesto