To level (surveying)
7-6-530
To determine differences in altitude using an optical instrument and a calibrated levelling staff.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
7-6-530
To determine differences in altitude using an optical instrument and a calibrated levelling staff.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
observation duration
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM