Concerned about the hazardous materials inside the ship, the Finnish Environment Institute issued a transport ban on the vessel to prevent her from being moved for scrapping in inappropriate conditions.

In October 1977 she was laid up in Turku until the Swedish Sessan Linjen company chartered her for traffic from Gothenburg (Sweden) to Travemünde (Germany) and Frederikshavn (Denmark) between January and March 1978.

Fennia was from the beginning too large a ship for Jakob Lines and already in December 1985 she was sold to Vaasanlaivat / Vasabåtarna (in exchange for Fenno Express and 19.1 million Finnish marks).

On 25 March 1986, Fennia began her service for Vaasanlaivat / Vasabåtarna on the Vaasa (Finland) – Sundsvall (Sweden) route.

On 12 November 1991 an accident in the engine room resulted in 14 tons of fuel oil leaking into the sea outside Örnsköldsvik.

After the end of the charter in May 1995, Fennia again returned to traffic across the Kvarken, sailing Vaasa–Umeå during the winter season and a varied itinerary from Vaasa and Jakobstad during the summer.

Pending a potential charter to a Turkish company, Fennia was docked in May 2000 and all Silja Line markings were painted over.

The ban would remain in place until certain knowledge about the future use of the vessel would be obtained or the new owner applied for a waste transport permit.

[6][7] While remaining laid up at Vaasa, water started to leak into C. Express's engine room in the early morning of 8 March 2009.

The leak could be contained by the ship's three-man crew and the local fire brigade before a major accident could occur.

The cause for the accident was believed to be water pipes on board that had broken due to freezing during the winter which started leaking as the weather got warmer.

[7] On 8 March a representative of the Finnish Maritime Administration who had inspected the ship stated that her engines are not in working condition, and if she remains laid up in Vaasa another winter she is likely to sink due to freeze damage and cause notable damage to the environment due to various hazardous substances, including fuel oil, that is still on board.

[8] Over the years the owner presented several plans for the future use of the vessel, including conversion to a casino or accommodation ship.

[9] Repairing of the engines and other machinery damaged by the water leak started soon afterwards and the ship was renamed Onyx in August 2009.

After passing inspection by the Finnish Maritime Administration and a successful sea trial in late October the ship left Finland on 3 November 2010 with two of her four main engines running, reportedly heading for a shipyard in Turkey for further repairs.

[10][11] The crew told the press that they hadn't received their pay for two months, resulting in the French officials detaining the ship, and most of them refused to continue journey before all four engines were in working order.

[12][13] However, the only shipyard in Iskenderun, Turkey, where the owner claimed the ship would be heading for repairs, announced that they were not expecting Onyx to arrive there.

[14] The destination was subsequently changed to a shipyard in Piraeus, Greece, and the ship left Brest on 10 February 2010, heading for Gibraltar.

[3] On 19 May 2010 the Finnish Environment Institute decided to contact the previous owner and Pakistani officials concerning the scrapping of the ship, and deliver the latter information about the hazardous materials inside the vessel.