Scientific, nautical, surveying, photographic, cinematographic, optical, [weighing,] measuring, signalling, supervision, life-saving and teaching apparatus and instruments, namely, [electronic hand held unit for detection of water ingress in thermal piping insulation,] Remotely Operated Vehicle (ROV) hull scanner, storage tank scanner, pipeline gas pig scanner, riser scanner, external pipeline scanner, fixed electric sensors for monitoring [hydrates, ice, corrosion coating and Monoethylene gl...