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

What colors do the bands on a Preferred Channel Mark display?

In this marking system, a preferred channel mark is identified by two horizontal color bands, green over red. That green-on-top, red-on-bottom pattern is distinctive and used specifically to signal the preferred channel when two options exist, so mariners know which channel to favor. The horizontal arrangement and the green–red color pairing are what set this mark apart from other marks (for example, safe-water marks use red and white vertical stripes, not horizontal green/red). So the bands are horizontal and colored green and red.

In this marking system, a preferred channel mark is identified by two horizontal color bands, green over red. That green-on-top, red-on-bottom pattern is distinctive and used specifically to signal the preferred channel when two options exist, so mariners know which channel to favor. The horizontal arrangement and the green–red color pairing are what set this mark apart from other marks (for example, safe-water marks use red and white vertical stripes, not horizontal green/red). So the bands are horizontal and colored green and red.