Used Loran A late 70’s on the USCGC Gallatin - mostly drug interdiction in the Caribbean. Had a Sat Nav 1980 on USCGC Glacier - about the size of large refrigerator - didn’t work. But mostly we piloted more - DR’ed more when in the
middle of nowhere, used our sextants.
Loran c was a huge improvement - only dodgy in places where intercept angles were steep.
Sat nav passes every few hours - were kind of useless, other than a good check on other means when you got them.
The satellites then were on a polar orbit. The higher the latitude, the more usable passes. In the Gulf a usable pass was every 4 hours. Surveying off Cartwright it was every 15 minutes. Our nav system was a doppler sonar with sat updates.
I posted earlier about calculating distance off a light ship with the underwater gong. We used the doppler sonar in hydrophone mode to time the difference between the lightship radio beacon and gong. Then using the water temp correction in Bowditch.
I was on the Gallatin in '75. I was thinking that it one of the best run ships I ever sailed on.
But it’s hard to judge, it was my first ship and I was an E-2. However a couple years ago I got together with an old shipmate from the Gallatin that had retired after 20 years and I mentioned that. He agreed, said it was the best run unit out of all the places he’d been stationed.
Yep. Loran A was on Yocona when I first got onboard in 1977; got a Loran C soon after onboard for setting NOAA buoys in Gulf of Alaska. Saw a lot of different variations of SatNav and Loran C in the early 80’s onboard Mellon. Times have changed…