32 preferably by two pivot arms hingedly connected to the vehicle to allow for relative movement the exit opening 16 of the suction mouth 10 is connected to a suction conduit 18 on the vehicle 32 preferably the suction conduit 18 is a flexible hose to allow for some freedom of movement of the suction mouth 10 relative to the vehicle 32 the flexible hose may be provided with steel support rings and a turning gland 19 may be provided to allow the suction mouth 10 to turn axially to follow the sediment during operation active height adjustment for the suction mouth 10 can be provided for example by hydraulic cylinders 34 once the suction mouth 10 rests on the seabed the hydraulic cylinders 34 may be set hydraulically free and the suction mouth 10 will set its height passively carrying its weight on the glide shoe 28 in order to control the vehicle 32 and determine the optimal height for the active height adjustment the vehicle 32 is provided with a real time detection system this takes the form of a number of sensors mounted on a retractable frame in front of the vehicle the sensors scan the soil in front of the vehicle for several objectives namely the detection of objects to be avoided both below the surface and in the direct surroundings of the vehicle to ensure that the correct path is being.