HabitableZone

Off Topic » in reply to Sub sinks tub.

Re: Per the comments on the site

It's hard to tell what happened just from the video, so I may be out of line here, but the first action should be to immediately stop the sub's engine (if nothing else, it prevents the sub's screw (prop) from chewing up the tug, and the tug from damaging the sub's screw. An American sub only has one screw, and it is exposed, so it is essential it be protected at all costs or the boat loses all maneuverability.

Yelling at the tug would have been useless, on any small surface ship, the exhaust noise from the deck vent fans make it difficult to hear anything on deck, not to mention the noise from the tug's engine. To get someone's attention, the standard emergency signal is a quick set of short blasts from the ship's whistle, and the sub has one, operable from the sail.

It is hard to tell just what happened here, so I hesitate to make too much of an analysis. They may have been in confined waters, there may have been a steering failure on the tug, or a communications failure on the sub, or maybe somebody just wasn't paying attention.

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