On 5 December, "Seid", approximately six miles south of Tulagi in the Solomons, made sound contact with a suspected submarine. An attack was made with hedgehogs, and the ship's course was altered to avoid passing over the pattern. The ship swung top slowly, however, for five seconds after the pattern hit the water, a violent underwater explosion knocked out "Seid's" sound gear. "Seid" then stayed clear of the area so as not to interfere with the sonic efficiency of other anti-submarine vessels. No further contact was made, and there was no evidence of damage to a submarine. After an hour's search, the ships proceeded to nearby Port Purvis on Florida Island.