Is tripping limited to harbor and coastal towing?

Correct Answer: Option C — No. Forces tending to capsize a tug are as dangerous on the high seas as they are in harbor and coastal work.

Tripping occurs when a tug is pulled over by its own towline, usually when the tow moves abeam of the tug. This risk is inherent to the physics of towing regardless of depth or location; high-seas conditions often exacerbate the forces involved, making the danger equally severe.