Been watching on Amazon Prime an Aussie programme called Sea Patrol.
Interesting programme each series has an underlying story and each episode has a complete story.
The programme is based on the crew of an Australian Naval patrol boat.
Few things wrong, sailing at top speed the E. R. is as quiet as mouse.
The revolutions to achieve full speed can be anywhere between 1,000 and 1800.
Minor niggles, well worth watching
Vic