Abstract: According to the present invention there is provided an underwater inspection assembly (1,100) comprising, a first unmanned underwater vehicle (2) which comprises, at least a first propeller (3a), at least a first camera (4a), and at least a first optical transceiver (5a); a tether (7) a first end (7a) of which is connected to the first unmanned underwater vehicle; a docking station (21,121) which attached to the first unmanned underwater vehicle (2), and wherein the docking station (21,121) is configured to receive docking means (22, 122) mounted on at least a second unmanned underwater vehicle (12); at least a second unmanned underwater vehicle (12) comprising, at least a second propeller (3b) which can be operated independently of the first propeller (3a), at least a second camera (4b), and at least a second optical transceiver (5b), wherein said at least first and second optical transceivers (5a,5b) are configured to selectively optically communicate with one another; and a docking means (22, 122) which i