Under the Rules, any vessel may slacken her speed, stop, or reverse her engines to allow more time to assess the situation.

Under the Rules, any vessel may slacken her speed, stop, or reverse her engines to allow more time to assess the situation.

• A. No Vessel May Change Speed
• B. Only Reduce Speed Slightly
• C. Slackening Speed, Stopping, or Reversing Engines
• D. Stop Only

Answer: (C)

In collision avoidance, you’re allowed to take decisive actions to gain time to judge the situation. Any vessel may slacken its speed, stop, or reverse its engines to allow more time to assess what’s happening and decide how to maneuver safely. This set of options is important because sometimes the only way to avoid a collision is to slow down a lot, come to a stop, or even back away to separate courses or reduce closing speed. Slowing down helps you observe the other vessel’s intentions and adjust gradually; stopping or reversing can be necessary when continuing at even a reduced speed would leave too little time or too much force in the encounter. The other possibilities are too restrictive. If you say no vessel may change speed, you’re denying a fundamental tool for safety. Limiting actions to a slight reduction or to stopping only doesn’t cover all scenarios where a stronger adjustment is needed to prevent danger. The key idea here is that, to keep everyone safe, altering speed or stopping or reversing engines is permitted to gain the time needed to make a safe decision.

In collision avoidance, you’re allowed to take decisive actions to gain time to judge the situation. Any vessel may slacken its speed, stop, or reverse its engines to allow more time to assess what’s happening and decide how to maneuver safely. This set of options is important because sometimes the only way to avoid a collision is to slow down a lot, come to a stop, or even back away to separate courses or reduce closing speed. Slowing down helps you observe the other vessel’s intentions and adjust gradually; stopping or reversing can be necessary when continuing at even a reduced speed would leave too little time or too much force in the encounter.

The other possibilities are too restrictive. If you say no vessel may change speed, you’re denying a fundamental tool for safety. Limiting actions to a slight reduction or to stopping only doesn’t cover all scenarios where a stronger adjustment is needed to prevent danger. The key idea here is that, to keep everyone safe, altering speed or stopping or reversing engines is permitted to gain the time needed to make a safe decision.