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SHIP & BOAT MODELS <title> Model boats ships sailboats wood model nautical decor </title>SHIP & BOAT MODELS Model boats ships sailboats wood model nautical decor
NAUTICAL GIFTSNAUTICAL GIFTS
NAUTICAL APPAREL
BAR AND DRINK WARE
BOSUN'S PIPE
DESK TOP ITEMS
SOUNDS OF THE SEA CD
LIGHTHOUSES
MEN'S ACCESSORIES
WOMEN'S ACCESSORIES
KEYCHAINS
HOURGLASSES
FRAMED COLLECTIONS
NAUTICAL CHESS SETS
NAUTICAL KITS
NAUTICAL COLLECTIBLES.
NAUTICAL NOTE CARDS
MERMAID COLLECTIBLE FIGURINES
SEA SHELL NAUTICAL CANDLES
WOMENS HATS
NAUTICAL  DECORNAUTICAL DECOR
SEA SHELLS AND CORALSEA SHELLS AND CORAL
ANIMAL  COLLECTIBLES, FIGURINES, & GIFTSANIMAL COLLECTIBLES, FIGURINES, & GIFTS
WEATHERVANES, and WEATHER INSTRUMENTSWEATHERVANES, and WEATHER INSTRUMENTS
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RETAIL STORERETAIL STORE
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HOURGLASSES

HOURGLASSES - click to enlarge
Hourglasses were invented around the 12th century. By the 15th and 16th centuries they were in general use on board sailing ships, and were actually used more to help with the timing of the ship's watches, than for navigation. Dead reckoning (guessing based on windspeed and weather conditions) was then the main way of establishing where the ship actually was. Small sandglasses were used to help with the log, and to find the speed of the ship. Typically, large ship's hourglasses were only made in thirty minute versions. Antique hourglasses of sixty minutes or more were mostly used to time religious sermons.