The Sea Wolves 1980

Three miniature ships are blown up at the end of this film by the heroes who employ a smaller vessel also represented in miniature. The submarine shots look like stock footage from another production.

 The Moon City Garbage Agency blogsite has the miniature sequences credited to Wally Veevers, while IMDB just credits him with "opticals".

For Your Eyes Only 1981

This was the twelfth James Bond film in the series and the fifth for which Derek Meddings supervised the visual effects. The movie begins with a pretty decent miniature trawler/spy ship sinking sequence. The St Georges trawler miniature was around 25 feet long (7.62m) and constructed by Terry reed and his associates. Other miniatures constructed for the film were miniature representations of Roger Moore and Carol Bouquet in yellow diving suits, a two person submersible and a one man submersible. The trawler sinking sequence was shot in the outdoor Paddock tank at Pinewood studios.

 

                

Source: Sci Fi & Fantasy Models magazine issue 21 July 1997, Special Effects Superman The Art and Effects of Derek Meddings. Shubrook Bros Publications 2008