This video recounts the tragic 1990 incident in Scotland's Bute Sound involving the fishing trawler Antares and the Royal Navy submarine HMS Trenchant. The HMS Trenchant, a nuclear-powered submarine, was conducting a demanding "Perisher" command course training exercise when it submerged and proceeded through the fishing grounds. The narrative details how the submarine snagged the Antares's trawl nets, catastrophically pulling the vessel under in seconds and causing the loss of all four crew members. The collision is attributed to critical failures in situational awareness aboard the Trenchant, including the misinterpretation of sonar contacts and a failure to adhere to the required minimum separation distance from fishing vessels. The video follows the subsequent search and rescue, the recovery of the wreck, and the official investigation which led to significant changes in Royal Navy submarine operating procedures to prevent similar future disasters.
The Story of the Antares: A Fatal Encounter at Sea
00:00:04 Setting the Scene: The video opens on a calm night in Scotland's Bute Sound, where three trawlers, including the Antares, are fishing. The narration foreshadows an impending disaster.
00:00:44 HMS Trenchant's Mission: The nuclear-powered submarine HMS Trenchant is introduced, which is conducting the notoriously difficult "Perisher" command training course with trainees aboard.
01:48 The Antares's Final Voyage: The crew of four aboard the fishing trawler Antares prepares for what they believe is a routine 5-day fishing trip to their usual grounds in the Bute Sound trench.
04:01 A Fateful Training Exercise: After completing a series of training exercises with the surface ship Caribdis, the Trenchant submerges to 60 meters. Command is handed over to a trainee captain as the vessel proceeds north.
05:59 The Collision: At 2:19 AM, after a sonar contact is identified as being alarmingly close, the Trenchant snags the Antares's trawl nets. The submarine's crew feels a shudder and hears loud bangs, identifying it as a "trawl snag."
07:22 The Sinking of the Antares: The trawler is violently pulled backwards and dragged underwater in seconds. The four crew members are trapped in the wheelhouse with no time to send a Mayday, and the vessel sinks with all hands on board.
08:16 A Missed Opportunity: The Trenchant surfaces and finds trawl wires tangled on its tower. Seeing no signs of distress from other vessels in the area and receiving no distress calls, the command team makes the critical decision to continue with their exercise.
09:17 Discovery and Recovery: Hours later, the alarm is officially raised after debris is spotted. A search operation locates the wreck of the Antares on the seafloor at a depth of 150 meters. The vessel is eventually recovered.
10:36 Failures and New Regulations: The investigation attributes the disaster to the Trenchant's failure to maintain situational awareness and adhere to the 2,000-yard minimum separation distance from fishing vessels. The incident led to stricter regulations, including a new 3,000-yard separation rule for submarines.
11:25 The Legacy of the Antares: The video concludes by noting the wreck was displayed in the Scottish Maritime Museum for 18 years. Today, a memorial plaque on the pier at Carradale honors the four lost crewmen.