luodata (englanniksi)

sound (v: tutkia veden pohjaa / nautical)
plumb (v: nautical)
cast (v: nautical)
fathom (v: nautical / to heave a lead and line in order to ascertain the depth of water / nautical / to ascertain the depth of water by any method, in modern times normally with a sonar)
probe (v: nautical / to measure with a probe, especially from a distance, as with a space probe)