Wind chill &
sailing

Literature
Home Nav. course Sailing Greece Turkish Coasts Yacht charter Gulets                          

Wind chill forecast

The term wind chill goes back to the Antarctic explorer Paul A. Siple, who coined it in a study: "Adaptation of the Explorer to the Climate of Antarctica".
In 1940 Siple and Charles F. Passel conducted experiments on the time needed to freeze 250 grams of water in a plastic cylinder that was exposed to the elements. The three parameters involved are: The wind chill factor or equivalent temperature uses a neutral skin temperature of 33 °C as a baseline value, so only two parameters remain.

Definition: Wind chill accounts for loss of heat when warm air around a body is replaced with colder air. The factor is an indication of the effect of the combination of air temperature and wind speed on human comfort and safety.

Indeed, the wind chill factor is a highly underrated tool to prevent hypothermia and frostbite on board!
Learn to sail:
RYA and ASA sailing schools and yacht charters in Greece and Turkey
Right click to down load...
This table provides equivalent temperatures and is based on the Steadman equation below, though many other variations exist:
ET = 0.045(7.1766 x √KNOTS + 10.45 - 0.5145 x KNOTS)(Celsius - 33.0) + 33.0
Current inadequacies include: safety
Conclusion: For your safety - even when sailing in the warmer waters of Greece or Turkey: anticipate and use the equivalent temperature to adequately forecast wind chill.

Further reading

Bareboat sailing and assisted bareboat charters in the Ionian
How to prevent seasickness
The Beaufort wind scale
Anchoring & Mediterranean mooring techniques
Advanced coastal navigation course
For swimming/snokelling in Greece: Seawater surface temperatures

 

E-mail:
E-mail:
Books·charts Sitemap| A-Z Contact RSS| Charterguide PDFs
2 February 2014
    © 2000 – 2014 Diederik Willemsen | E-mail me
Site map | A-Z index | Register

 RSS XML Feed | | Level AA conformance icon, W3C-WAI Web Content Accessibility Guidelines 1.0 | |