Sea anchor, sextant and some real pictures

Boom, Mast, stern and parts

Crest

For sea-anchor:
https://youtu.be/RZAHZphZca8

Sextant

/ˈsɛkst(ə)nt/

Learn to pronounce

noun

noun: sextant; plural noun: sextants

an instrument with a graduated arc of 60° and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation and surveying.

Origin

late 16th century (denoting the sixth part of a circle): from Latin sextans, sextant- ‘sixth part’, from sextus ‘sixth’.

A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of asextant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation.

THE REAL PICTURES:
The wavewalker:

http://news.bbc.co.uk/local/gloucestershire/hi/people_and_places/newsid_8417000/8417142.stm

Comments

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Std 11th, 12th NCERT syllabus sollutions .

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