Lights and Shapes COLREG 2.5

the author of this app says:

Lights and Shapes is designed for those who are studying RYA
exam or wish to get access to an accurate reference to
identify ships at sea. The program is based on the Part C
of the International Regulation for Preventing Collisions at
Sea (COLREG)

Completely in English

The program is divided in four parts:
-Regulations. A full copy of 'Part C' of the International
Regulations for Preventing Collisions at Sea
-Lights and Shapes. More than 120 images (bow, stern, port
and starboard) of all kind of ships and how to identify them
by their lights.
-Sounds signals. Now you can see and listen to all sound signals on Part D of COLREG (version2.0 or above)
-Test. Hundreds of test to check your ship recognition level.

Requirements

Requires iOS 3.1.3 or later