Although delivered in 1976 both ships only entered real service in 1993, after their sale to Bonny Gas Transport Bermuda Shell, a subsidiary of Nigeria LNG Limited.

After completion they did not go into service for nearly two decades and were both laid-up for years in the Scottish Loch Striven as there was insufficient work for them to cause their owners to place them into operation into the LNG transport market.

[2] The ship was built to transport LNG from the newly discovered gas-fields in Algeria to the West-European markets via the Dutch port of Delfzijl.

Due to economic development at the time and the after effects of the 1973 oil crisis this project never materialized and after completion the ship was laid up in Loch Striven.

In 1993 Gastor was sold and renamed LNG Lagos and finally entered service under the new owner Bonny Gas Transport - Shell Bermuda.

This ship was built to transport gas from Indonesia to the United States but suffered the same fate as Gastor: being laid-up in Loch Striven between 1976–1993, except for a quick return to the shipyard in the mid 1980s when a construction/design error was being repaired.