Contains pictures of lights and signs of ships, as well as explanations.
Includes a direct link of each illustration to the text COLREG 72
Full text COLREG - 72 and USCG Inland navigational wheel.
Lacking port or starboad or stern views. No all round masthead light for sailing vessels. No lights for long tow. No lights for dredge. No lights for vessels of different lengths. No day hoist shapes. Sound signals incomplete.
More involved than other nav apps and competitively priced, a few errors needing ironed out still.