Boating Coach
Emergencies and cold waterQuestion 269 of 566

What should you do with a marine CO detector's batteries?

  1. Replace them once a year.
  2. Check them each spring.
  3. Check them before every trip.
  4. Check them after each CO alarm.
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Correct answer: Check them before every trip.

A dead detector gives no warning, so check before each trip.

Source: Safe Boating Guide (TP 511E, 2026), Be aware of carbon monoxide dangers, page 34

All questionsPractice the topic "Emergencies and cold water"

Questions last reviewed: 18 October 2026