DICTIONARY OF

Engineer 128 Equal Altitudes
Engineer. Officer who is in charge of engines for the time being. Certificated officer
competent to take charge of engines and to effect repairs and adjustments.
Engine-Room. Space in which main engines are situated, controlled and attended.
Engine Seat. Strengthened floors, plates and other members, in which bedplate and main
engines rest.
English Quadrant. 'Backstaff,' or 'Davis Quadrant'.
English Sennit. Made with any number of parts, each of which is laid alternately over and
under the other parts.
Enif. Star Pegasi. S.H.A. 34°; Dec. S10°; Mag. 2-5.
Enquette du Pavilion. Demand, made by warship, for a vessel to show her national ensign.
Ensign. National flag or banner; more especially when national ensign is in upper inner
canton and remainder is of one colour.
Entering In. Reporting arrival of a ship to Customs authorities, by Master.
Entering Out. Report made to Customs authorities before taking cargo into a ship.
Entering Port. 'Entry Port'. In some countries special ports are nominated at which vessels
must first call before other harbours may be visited. Vessels must also call at the Entry Port
before finally leaving the country.
Entrance. Form of fore part of vessel's hull below water line.
Entropy. Heat energy that is not convertible to work.
Entry. Opening, in ship's side, by which one enters. 2. Entrance.
Epact. Difference in days and parts of a day, between 12 lunations and a solar year. Value is
10 days 15 hours. Epact for the year is Moon's age at 00 hrs. on January 1. Epact for the
month is Moon's age at 00 hrs. on first day of month, assuming Epact of year to be 00 hrs.
Ephemerides Nautiques. Abridgment of 'Connaissance des Temps' made for use of seamen.
It is thus the French equivalent to the British 'Nautical Almanac.'
Ephemeris. Almanac giving positions of heavenly bodies at intervals not exceeding one
day.
Epicycle. Circle whose centre is situated in circumference of another circle.
Epoch. A particular moment of time from which other times are reckoned. In tides, it may
be used to define the instant when an harmonic constituent transits a meridian. In U.S.A.
practice it is used to denote the interval between the transit of a tidal constituent and the
occurrence of its maximum effect.
Epoch of Chronometer. Elapsed interval from the last comparison. Generally expressed in
days and fraction of a day.
Epotides.* Blocks of wood on either side of stem of a galley.
Equal Altitudes. Two observations of the same body, one on either side of meridian, when
used for finding longitude.