North Sea Hijack

North Sea Hijack released as Ffolkes outside the UK and as Assault Force on US TV is a British action film from 1979 starring Roger Moore, James Mason, Anthony Perkins, and Michael Parks. It was directed by Andrew V. McLaglen and adapted by Jack Davies from his novel Esther, Ruth and Jennifer.

Misogynist freelance marine counterterrorism consultant Rufus Excalibur ffolkes Roger Moore is asked by Lloyds of London to develop a contingency plan should any of the North Sea oil installations they insure be threatened.Months later, Esther, a North Sea supply ship, takes on board a group of men posing as reporters who are visiting the oil production platform Jennifer. The leader of this group, Lou Kramer Anthony Perkins, along with his secondincommand, Harold Shulman Michael Parks, hijacks the ship, and two scuba diving henchmen attach limpet mines to the legs of Jennifer and its oil drilling rig, Ruth. From the bridge of Esther, Kramer issues a ransom demand formillion or he will blow up Ruth then, if the ransom is still not paid, he will destroy Jennifer. For good measure, he rigs Esther with explosives and has all the charges wired to a control panel that never leaves his side. ........

Source: Wikipedia