Master the Navigation, Seamanship, and Shiphandling (NSS) – Officer of the Deck (OOD) Phase 2 Exam with engaging flashcards and multiple choice questions, complete with hints and explanations. Prepare comprehensively for your test!

Multiple Choice

Which of the following describes an Isolated Danger Buoy in terms of color and topmark?

Isolated danger marks indicate a hazard that exists in all directions around the buoy. The standard signaling is red and black horizontal bands, and the topmark is two black spheres. This combination uniquely identifies an isolated danger buoy, helping you distinguish it from other marks such as cardinal marks (which use two black cones and are yellow/black) or special marks (yellow with a cross). So the description red and black with two black balls is the correct match.

Isolated danger marks indicate a hazard that exists in all directions around the buoy. The standard signaling is red and black horizontal bands, and the topmark is two black spheres. This combination uniquely identifies an isolated danger buoy, helping you distinguish it from other marks such as cardinal marks (which use two black cones and are yellow/black) or special marks (yellow with a cross). So the description red and black with two black balls is the correct match.