Alternative term: Run-hour meter, elapsed-time meter
An instrument that indicates the time during which a device or machine has been in operation.
Note: If the device is used with a rotary machine, the term running-hours recorder is also used.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
nertia of the water plane
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM