How often does camera kit need to be serviced?
Immediately before and immediately after every dive. It is the user’s responsibility to clean O-ring grooves, clean, check, and grease O-rings, check all functions, and so on; and then wash the equipment and de-mount all junctions between dissimilar metals afterwards (to prevent corrosion). No amount of technician service can compensate for bad working practices, and most accessory items will function for years without technical intervention if correctly looked after. Periodic technical service is of benefit in the case of underwater stills and video housings. An annual service is advisable if the camera has moderate use. It is also sensible to arrange for equipment to be serviced before embarking on an expensive diving holiday or expedition, and to allow several weeks for the sourcing of any spare parts which may be needed.