One of the ships with the rescue craft - known as ARRCs - in the davits.

Back in 2005 the four BP Jigsaw ships entered service. They were designed by Offshore Ship Designers against a pretty complex specification. They had to combine the capabilities of a platform ship and an ERRV (standby vessel), and in addition the standby capability consisted of two very high specification rescue craft. Initially there were endless problems. The rescue craft themselves suffered from structural problems as did the davits, hardly surprising considering the fact that the things weighed over 30 tonnes. In addition the vessel themselves proved to be difficult to handle and so had to have additional thrusters installed. At the time of writing (2016) the whole thing has been dumped and the ship have become standard - very large - PSVs.

TYPE: IMT 992		NAME: CALEDONIAN VANGUARD		Photo: Vic Gibson
GENERAL		PROPULSION		CARGO CAPACITY
Length OA	93.45m	Engines	4 x Cat 6M25	Fuel	1434 m3
Breadth	22m	BHP/kW	11200/8240	Pot water	1263 m3
DWT	4380 mt	For'd Thrusters	2 x 1100 kW	Mud	790 m3
Deck area	1075 m2	Az Thruster	1 x 880 kW	Base oil
Berths	46	Aft Aziprops	2 x	Brine	790 m3
Year built	2005	Joystick		Dry bulk	392 m3
Shipyard	Yantai Raffles	DPII	Converteam C	Tank Cleaning
Previous names
Comments	The ship carried two autonomous rescue vessels and is a 300 survivor standby vessel