Marine Navigation for Seafarers

Navigation is the art and science of moving a vessel safely from one place to another, guided by standard publications such as Admiralty charts, Nautical Almanac, tide tables, and GPS.

Master rules of the road in any condition of visibility by maintaining a proper lookout, safe speed, and proactive collision avoidance using radar, ARPA, bearing checks, and traffic separation schemes.

Explore the rules of the road for vessels in sight, including sailing vessel interactions, overtaking, head-on and crossing situations, and the responsibilities of stand-on, give-way, fishing, and constrained vessels.

Master the rules of the road with a focus on visibility of lights and minimum ranges. Apply rule 22 to vessels 50 m or more.

Learn the rules of the road for power driven vessels underway, with emphasis on rule 23 and part a.

Explore rule 25 for sailing vessels underway and under oars, detailing sidelights and sternlight, combined lanterns under 20 m, top red and bottom green lights, and torch or conical shapes.

Learn rule 26 for fishing vessels. Covering trolling and non-trolling lights, this rule includes green over white or red over white signals, two cones, and masthead, sidelights, and stern lights.

summarizes rule 27: vessels not under command or restricted in ability to maneuver, detailing night and day signals, lights, and shapes for towing, dredging, minesweeping, and diving operations.

Discover rule 30: anchored and aground vessels, detailing forward and stern white lights, anchor lights, deck lighting for large ships, and red signals with day signals of three balls.

Explore Rule 31 for seaplanes under the rules of the road, detailing when seaplanes must exhibit lights and shapes and how they act as power-driven vessels on water.

Calculate the eta by dividing the voyage distance by speed to find hours and days. The second officer lays courses, measures distances, and reports eta to the master.

Examine British Admiralty metric charts to identify depth, coastline, navigational aids, and compass rose features. Compare small and large scale charts for route planning, anchoring, buoys, obstructions, and tides.

Learn the four-step marine navigation technique, beginning with drawing the desired courses on Admiralty charts to plan safe and accurate routes.

Calculate cosine distance between two waypoints using Mercator rhumb line navigation to determine the true course and distance; example yields 203°40.5' and 3,480.5 nautical miles.

Compute course and distance between two waypoints with the Tamiya NC 77 digital navigation computer, covering great circle sailing, cosine distance, initial course, and vertex coordinates.

Explore methods of navigation and position fixing at sea, from celestial sun and star sightings to chart plotting, coastal landmarks, radar observations, and GPS positioning.

Explore magnetic and gyro compass navigation on ships, detailing the magnetic compass’s standard, binnacle protection, deviations, and the gyro compass’s master unit with repeaters for true north bearings.

Convert the true course to a compass course using the cadet method, apply the compass error, and plot true courses on the chart while steering with a magnetic compass.

Explore the role of marine pilots, pilot boarding grounds, and pilot communications, detailing boarding arrangements per solas regulations and emphasizing that the master remains responsible for the vessel.