Abstract: An alignment system for use in aligning a first object with a second object, which system comprises a transmitter (6) for transmitting a directable signal, mounted on either the first object or the second object, a receiver (8, 9) for receiving the signal, mounted on the other of the first object or the second object and an indicator (12, 13) for indicating that a signal from the transmitter (6) has been received by the receiver (8, 9). Preferably, a single pair of transmitters (6) is mounted on a crane (7), a single pair of receivers (8) is mounted on a prime-mover (3) and a plurality of pairs of receivers (9) are mounted on a chassis (4) at intervals corresponding to positions midway along the lengths of each of a plurality of containers (2) supported by the chassis (4). Alignment of the transmitter (6) with the receiver (8) on the prime-mover (3) activates an indicator (12) for indicating that the movement of the prime-mover (3) is to be slowed.

Abstract: A pumping arrangement for pumping water to ships comprises a pump having an inlet and an outlet, a level sensor, connectable to the outlet, for insertion into a water tank, and a control arrangement associated with the level sensor. The control arrangement de-activates the pump in response to a signal from the level sensor so as to avoid over-filling of the tank. The pumping arrangement further comprises transmitting means to transmit a signal at the same time as the control arrangement de-activates the pump. Such a signal is transmitted to, for example, a paging unit. Several pumping arrangements may be used at once with several ships, the paging unit being adapted to inform the operator when a given pumping arrangement has filled a water tank.