Observe and identify
Developing level, about 2 min. International COLREGs / IRPCS.
The situation
In fog a vessel nearby sounds one metal instrument and then another. What does the complete sequence tell you?
What can you conclude from the signal in these circumstances?
- An anchored vessel at least 100 m long
- A power-driven vessel stopped but underway
- A sailing vessel underway
Answers and explanations
Lookout: Use the situation as well as the sound. Listen to the full sequence before deciding.
The sound answer
An anchored vessel at least 100 m long
An anchored vessel at least 100 m long. In or near restricted visibility, by day or night. The signal gives operating information; it does not establish a stand-on vessel. Bell in the forepart, immediately followed by a distinct gong in the afterpart, about five seconds each.
Why the other options fall short
A power-driven vessel stopped but underway
An anchored vessel at least 100 m long. In or near restricted visibility, by day or night. The signal gives operating information; it does not establish a stand-on vessel. Bell in the forepart, immediately followed by a distinct gong in the afterpart, about five seconds each.
A sailing vessel underway
An anchored vessel at least 100 m long. In or near restricted visibility, by day or night. The signal gives operating information; it does not establish a stand-on vessel. Bell in the forepart, immediately followed by a distinct gong in the afterpart, about five seconds each.
Rule 35(g) · At anchor: bell then gong
An anchored vessel at least 100 m long. In or near restricted visibility, by day or night. The signal gives operating information; it does not establish a stand-on vessel. Bell in the forepart, immediately followed by a distinct gong in the afterpart, about five seconds each.