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Roman ship represented in a fresco of the 2nd or 3rd century in the port city of Ostia. The inscriptions reflect the name of the ship (Isis Giminiana), the name of the captain or magister (Farnaces, at the helm) and the name of the owner (Arascanius, in charge of the cargo). [4] Roman sarcophagus from the 3rd century.
A navigator is the person on board a ship or aircraft responsible for its navigation. [1] The navigator's primary responsibility is to be aware of ship or aircraft position at all times. Responsibilities include planning the journey, advising the ship's captain or aircraft commander of estimated timing to destinations while en route, and ...
Port: the left side of the ship, when facing forward (opposite of "starboard"). [1] Starboard: the right side of the ship, when facing forward (opposite of "port"). [1] Stern: the rear of a ship (opposite of "bow"). [1] Topside: the top portion of the outer surface of a ship on each side above the waterline. [1] Underdeck: a lower deck of a ...
For ships and aircraft, routes are typically straight-line segments between waypoints. A navigator determines the bearing (the compass direction from the craft's current position) of the next waypoint. Because water currents or wind can cause a craft to drift off course, a navigator sets a course to steer that compensates for drift.
4 - Compass north, including a two-part error; the magnetic variation (6) and the ship's own magnetic field (5) 5 - Magnetic deviation, caused by vessel's magnetic field. 6 - Magnetic variation, caused by variations in Earth's magnetic field. 7 - Compass heading or compass course, before correction for magnetic deviation or magnetic variation.
Nautical publications is a technical term used in maritime circles describing a set of publications, either published by national governments or by commercial and professional organisations, for use in safe navigation of ships, boats, and similar vessels.
Chip log and sand glass serve to measure the ship's speed through the water.; Sounding line used to measure the depth of the water and to pick up samples from the bottom.; Drift meter optically measures the effects of wind on an aircraft in flight.
A ship seen to be on a constant bearing with decreasing range will collide with the observer's ship unless avoiding action is taken. Constant bearing, decreasing range ( CBDR ) is a term in navigation which means that some object, usually another ship viewed from the deck or bridge of one's own ship, is getting closer but maintaining the same ...