time sight

time sight

[′tīm ‚sīt]
(navigation)
A common method for determining longitude by celestial observations; these observations are reduced by solving the navigational triangle for meridian angle and require known or assumed values for altitude, latitude, and declination; the meridian angle is converted to local hour angle and compared with Greenwich hour angle, and the latter is read from astronomical tables.
References in periodicals archive ?
If treated in time sight can be preserved in most of the cases.
By the time sight starts to become blurred the damage is done, and eventually it will rob you of your eye sight.