Mara Maru - 1952 - 5/10

Errol Flynn as salvage boat skipper working in the Philippines.
His partner is murdered, just after drunkenly boasting about “treasure.”
Shadowy types then circle the captain, who has no idea of any loot.
Sluggish film, despite underwater sequences action trappings.
Flynn looks tired and not remotely interested. Raymond Burr as suspicious party comes off best.
Story is recycled from dozens of other, better, titles.
Worth a look if on late night, though this almost put me to sleep.