A vessel of 110 meters in length is at anchor in restricted visibility. After sounding the bell in the forepart of the vessel, what additional action is required, and where must it be performed?

1. A. Sound the whistle immediately after the bell; the whistle may be sounded from any location.
2. ✓ Sound the gong rapidly for about 5 seconds in the after part of the vessel, immediately after ringing the bell.Correct
3. C. Ring a second bell in the after part of the vessel for about 5 seconds.
4. D. No additional action is required; the bell signal alone satisfies the requirement for all vessels at anchor.