A listener contacted RTE's Joe Duffy to tell him he was shocked when an episode of Channel 4's Naked Attraction was broadcast on a 50-inch television screen on an Irish Ferry.
The man phoned the show to express how he felt it was inappropriate for the ferry to be broadcasting a show that features close-ups of genitalia on a boat where there were children present.
He said: "We got a bit of an eyeful on Irish Ferries on Tuesday evening. We arrived back into Dublin yesterday.
"We were in the lounge, the recliner lounge, on the boat, very nice, very large, very comfortable, Channel 4 was on and there was Gogglebox.
"Then at about 11 the programme changed and it became a Channel 4 programme called 'Naked Attraction', which is a dating programme.
"I hadn't seen it before - I'm not sure if you watched it Joe.
"Basically it's a dating programme where you chose you partner by naked attraction, and in that, you start by seeing the bottom half of, in this case, it was four men, five men, and then they reveal up to the face and they ask them questions."
The man said he had no problem with the show itself but didn't think it should be on a screen in a public part of the boat that children are allowed into.
He said: "I mean I have no problem with the programme itself, it looked a bit of fun.
"The issue I had was that the boat had lots of children on it, now thankfully I didn't see any in the lounge, but it's a big 50-inch TV, and they zoomed in right on the person's… so you could really see everything."
When asked if anyone had attempted to turn the television off, the man said: "One person did go up and try.
"There was an elderly couple in front of us, and the lady was chatting with the husband. She went out, she said she was going to complain - she never came back and the gentleman stayed and watched the next hour of it.
"I mean, in a way it was funny, because you could see some people were looking at it and smiling. Others were kind of looking at their phone and you could see them looking up every so often as things appeared on screen."
The man said he believes parents should be the ones to decide what is appropriate for their children to watch.
He said: "I've nothing wrong with it, but I mean some parents might want to choose that themselves, and I mean there's a difference between maybe a 15-year-old and maybe a two or three-year-old."
The man tried to contact Irish Ferries about the issue but is yet to receive a response.
He said: "It was amusing when I emailed Irish Ferries. They say they'll respond in two to three weeks due to the volume of emails."
