Vuistregels voor zeilers: verschil tussen versies
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(Nieuwe pagina aangemaakt met 'Onderstaande vuistregels zijn precies wat de naam zegt: vuistregels. Dat wil zeggen, ze kunnen goed van pas komen, maar alleen als je dat met verstand doet. Sommigen b…') |
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* You can see individual windows in a house just inside two miles. | * You can see individual windows in a house just inside two miles. | ||
* You will usually see a lighthouse at 7 to 8 miles off. | * You will usually see a lighthouse at 7 to 8 miles off. | ||
| − | * Note when a buoy or other landmark is 4 points (45º) on the bow (easy to judge) and read the log if you have one. If not, note the time and guess the speed | + | * Note when a buoy or other landmark is 4 points (45º) on the bow (easy to judge) and read the log if you have one. If not, note the time and guess the speed. |
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Versie van 24 dec 2011 om 01:05
Onderstaande vuistregels zijn precies wat de naam zegt: vuistregels. Dat wil zeggen, ze kunnen goed van pas komen, maar alleen als je dat met verstand doet. Sommigen bevatten halve waarheden, en er zijn er bij die meer tot het 'visserslatijn' gerekend moeten worden. Garantie tot de boeggolf dus!
Het schatten van afstanden:
- Your height of eye in a yacht's cockpit is probably 2-3 metres, in which case the horizon is 3-4 miles off. Add that to the visible range (NOT the luminous range) of a light at night and you know your distance off when it dips (you can if you wish correct for tide unless it's a lightship). This is quite accurate; if you do not correct for tide you are further off, except at high water.
- If you can see the bow wave of a ship on the horizon, or the hull of another boat on the horizon, she is two and a half miles off.
- in daylight, you can tell the colours on a large buoy at about a mile. You will see the buoy at a distance of about 2 miles.
- You will see a light buoy at a distance of 2 to 3 miles at night. At about 200 metres the light will reflect from the surface of the sea.
- You see a man walking as a tiny moving line at half a mile, the movement of people's arms and legs at about 400 yards and their faces at 250 metres.
- A light coloured beach can be seen at about 4 miles. You're in to less than a mile when you can discern individual trees.
- You can see individual windows in a house just inside two miles.
- You will usually see a lighthouse at 7 to 8 miles off.
- Note when a buoy or other landmark is 4 points (45º) on the bow (easy to judge) and read the log if you have one. If not, note the time and guess the speed.
