摘要:
A service installation for underwater servicing operations including a service unit, a working bell supported by the service unit, a control chamber carried by the bell and separable therefrom by a watertight door, a submerged base, the bell being movable on to the base to there form with the base a watertight chamber and a transfer chamber coupled to the service unit and movable to the bell when the latter is on the base and connectable to the control chamber for transfer of a work crew via the control chamber to the bell.