A brief Repetition of which is before spoken.

There are three kinds of Navigation, Horizontle, Paraboral, and Sayling upon a great Circle, performed by the Corse and Travers.
A Corse is the paraboral line, which is described by the Ships motion upon any point of the Compass.
A Travers is the variety of the Ships motion upon & very alteration of Corses.
The Compass is an artificial Horizon, by which Corses and Traverses are directed, and containeth 32 points, and a very point containeth 11 1/4 degrees. or 45 minutes, being 3/4 of an hour.

By such quantity of time as the Moon separateth her self from the Sun, be the like rate of time every tide both one differ from another.
In every hour the tyde altereth two minutes, in every flood 12 min. and in every ebbe 12 min. and in every day 48 minutes, because that so is the Moons separation from the Sun: for the Moon doth separate herself from the Sun, in every day one point and 3 minutes, between the Change and the Full she is to the Eastwards of the Sun, and then is her separation, at which time she is before the Sun in respect of her natural motion but in regard of her violent motion, she is then behind or abaft the Sun.
Between the Full & Change, she is to the Westward of the Sun, applying towards the Sun, and then is her application, at which time she is behind or abaft the Sun, in respect of her natural motion, but in consideration of her violent motion, she is then before the Sun.
She hath a violent motion, a natural motion, a slow, swift, and mean motion.
In every 27 degrees and 8 hours, she performeth her natural motion through the Zodiack.
Between Change and Change there is 29 days, 12 hours, 44 minutes nearest.
The Solar year consisteth of 12 months, and the Lunar year of 12 Moons.
The Moons Age is found by the Epact.
All Instruments used in Navigation, of what shape or form soever they be, are described or demonstrated upon a Circle, or some portion of a circle, and therefore are of the nature of a Circle.
A Degree is the 360 part of a Circle, how big or little soever the Circle be.
A Degree is applyed after the 6 several sorts, to the Equator, to the Meridian, to the Horizon, to the vertical Circle, to Measure, to Time.
Altitude is the distance, height, or mounting of one thing above another.
The Poles Altitude is the distance between the Pole and the Horizon, or the position of the Meridian which is contained between the Pole and Horizon.

The Altitude of the Sun above the Horizon, is that portion of the vertical circle, which is contained between the Horizon and the Sun.

Latitude, is that arc of Meridian which is contained between the Parallel of any place and the Equator, or that part of the Meridian which is included between the Zenith and the Equinoctial.

Longitude is that portion of the Equator contained between the Meridian of S. Mihels, one of the Iles of the Assores and the Meridian of the place whose longitude is desired: the reason why the accompt of the longitude both begin at this Isle, is because that there the Compass hath no variety, for the Meridian of this Ile passeth by the poles of the world, & the poles of the Magnet, being a meridian proper to both poles.

The Longitude between place and place, is the portion of the Equator, which is contained between the Meridian of the same places.

Declination is the distance of the Sun, Moon, and Stars, from the Equinoctical, or that part of the Meridian which passeth by the Center of any celestial body, and is contained between the same center and the Equinoctical.

Hydrography is the description of the Ocean Sea, with all Iles, Banks, Rocks, and Sands therein contained, whose limits extend to the Geographical borders of the earth, their perfect notice whereof is the chiefest thing required in a sufficient Pilot, in his excellent practice of Sayling.

Geography is the description of the earth only, whereby the terrestrial form in his due situation is given, whose distinction is by mountains, rivers, vallies, cities, and places of fame, without regard of Circles, Climates, and Zones.

Cosmography is the description of the Heavens, with all that is contained within the circuit of but to the purpose of Navigation, we must understand Cosmography to be the universal description of the terrestial Globe, distinguished by all such circles, by which the distinction of the celestial Sphere is understood to be given, with every Country, Coast, Sea, Harborow, or other place seated in their due longitude, latitude, zone, and clyme.

The Chart is a special Instrument in Navigation, presenting the Cosmographical description of the terrestial Globe, by all such lines, circles, corses, and divisions as are required to the most exquisite skill of Navigation.