It’s not likely Loran unless it’s older than 1990. Many of the commercial fishing vessels I chartered had it but no one really kept it up after 1990, perhaps earlier. I have no idea what the antennae looked like. Loran was never intended for, or that useful in inland waters, due to the effect of islands and mainland features. For example, I remember a discussion way back in the day with one of my fisherman if they could get occasional loran fixes off the Fraser River in the Strait of Georgia and I was told it wasn’t useful in that area. It was mostly employed by the off-shore fleet, west coast trollers and trawlers. For example they would mention that they were on or liked a tack on the XX,XXX line.