Abstract: A method and system for measuring relative speed of a ship through a body of water with improved accuracy and simplicity. It employs a free floating buoy and a pair of tracking scopes. The buoy is launched and tracked by the scopes with electronic circuit arrangements so that the time of relative movement of the buoy between transverse positions opposite the scopes is accurately measured.

Abstract: A manometer type instrument with an open leg above an indicator fluid. It is subject to immersion in a body of liquid, the change in level of which is to be measured. It includes an improvement which eliminates the formation of a capillary seal at the top of the open leg. The improvement uses a relatively thin wire that is supported so as to extend down into the open leg far enough to reach through the capillary seal.

Abstract: A system for concurrently transferring a volatile liquid fuel from a source thereof into a fuel tank, while receiving vapors which are displaced from the tank during the inflow of the liquid fuel. Included in the system is a vacuum assist arrangement capable of imposing a vacuum condition on the vapor return line to avoid passage of vapors to the atmosphere. The liquid phase of the system includes a liquid flow regulator adapted to establish a desirable flow rate. Further, a vapor restrictor interposed in the vapor section of the system includes means to both throttle and regulate the vapor flow whereby to establish a favorable vapor:liquid ratio during normal operation.

Abstract: A fuel dispensing nozzle capable of sealably engaging a baffled filler pipe during a tank filling operation; a longitudinally slidable sleeve or member carried on the nozzle's discharge tube permits use of the nozzle in tank filler pipes having a deep set baffle, thereby facilitating the introduction of fuel into said tank.