She was also fitted with a gun in plain sight; as many merchant ships were defensively armed by this stage of the war, Pargust would have looked suspicious without it.

Pargust was hit at 8 am; shortly after Campbell ordered his panic party out, a group masquerading as the merchant crew who abandoned ship in simulated disorder, to further convince the U-boat that it was safe to approach.

The U-boat closed in at periscope depth, then circled Pargust and her boats in order to inspect her for any signs of concealed weapons.

Pargust's gunners scored numerous hits on the U-boat, damaging the conning tower particularly, and the crew started to abandon ship, raising their hands in surrender.

At this, and to prevent the U-boat escaping (Pargust was immobilised, and unable to pursue) Campbell commenced firing again, which continued until 8.40 am when UC-29 blew up and sank.

[3] Pargust remained afloat, and was joined by the sloops HMS Crocus and Zinnia, and the American destroyer USS Cushing.

She joined a special service force based there for patrol work in the mid-Atlantic, where German "U-cruisers" were operating, and in the western Mediterranean.