Abstract: The present invention provides a bathymetric survey system and method, and in particular a system and method involving multiple unmanned autonomous vessels arranged to provide improved efficiency when conducting a bathymetric survey, by traversing a first survey line with a first lead vessel while mapping the seabed and water depth beneath the first vessel, dynamically generating an adjacent survey line, as the first vessel traverses the fist survey line, based on mapping data acquired from traversing the first survey line, and traversing the adjacent survey line with a second vessel trailing the first vessel while mapping the seabed and water depth beneath the second vessel.

Abstract: The present invention is concerned with a hydroelectric blade connector which is operable to secure a blade to a rotor of a hydroelectric turbine and to securely retain the blade during operation, the blade connector include a pair of interlocking parts, the first part being a tapered root of the blade itself, and the second part being a body provided in or formed integrally with the rotor and defining a tapered channel for receiving the root of the blade in order to establish a taper lock therewith.