This "Omega" system...would that not be Loran? Like, Loran A or B? I don't think Loran C was out at that time, as my father, a charter boat operator in the early 70s, started using Loran A at that time, and 10 years ago he bought his last Loran C equipment. Now he navigates by GPS, it's really neat around Cape Flattery and going between Tatoosh island and the mainland, aka "the slot." Just like IFR flying. Can't see a thing but you know that there are a bunch of rocks around you. Sorry, got off the forum topic...not aviation related, but navigation nonetheless.
Save the whales...for dinner!!!