An apparent wind indicator, as found on sailboat, is a small weather vane or arrow that gives an indication of the current apparent wind direction. This...

into the wind. If employed on a boat, they are referred to as apparent wind indicators. The oldest known textual references to weather vanes date from...

since the force of the sail is never closer than 45 degrees to the apparent wind. Since most sailboats are symmetric along their axis of motion, when...

The flag gives an indication of apparent wind direction. True wind can also be indicated by a fixed wind indicator (flag, windsock, etc., not attached...

leeway of the vessel under sail; counterweight to the lateral force of the wind on the sail(s) that causes rolling (heeling); as bilge keel to allow drying...

at any time, as it submerges when the boat heels under the force of the wind. A disadvantage, where there is an inadequate fixed keel, is that leeboards...

provides no righting moment when the boat is level. The heeling force of the wind on the sails is therefore not counteracted until the boat has heeled over...

keel) is to balance the force of the wind on the sails. Without a daggerboard or keel, a sailboat could not sail up-wind and would simply be blown sideways...

bilgeboards are angled so that as the boat heels, or leans under the force of the wind, the leeward bilgeboard becomes more upright, and provides the greatest possible...

of a sailing ship Aftercastle Afterdeck Anchor Anchor windlass Apparent wind indicator Beakhead Bilge Bilgeboard Bitts Bollard Boom brake Bow or prow...

PMID 10038875. US 3845734, Demos, Peter T., "Apparent wind indicator adapted to establish optimum wind direction relative to the sail of a sailboat"...

to water and shade. Apparent temperature Thermal comfort § Interplay of temperature and humidity Humidex Wet-bulb temperature Wind chill Steadman, R. G...

or larger and/or winds at or above 80 miles per hour (130 km/h) is indicated by radar or observed. (Warnings assigned this indicator incorporate the notation...

their hat to classical and clerical authority by inserting indicators of the 12 classical winds on their nautical charts – not, of course, on a compass rose...

Sunshine duration or sunshine hours is a climatological indicator, measuring duration of sunshine in given period (usually, a day or a year) for a given...

formed of loess, a clastic silt-like sediment formed by the accumulation of wind-blown dust. It is located southeast of the Gobi Desert and is surrounded...

this case over 220 km/s at the equator. The "p" is a general spectral indicator of peculiarity. This combination of spectral characters is unusual because...

wind speeds that may affect ambient air temperature. Extreme Cold Warnings are issued within 12 hours of the onset of the defined actual or apparent temperature...

from wind and small hydropower plants. The Republic of Kazakhstan has the potential to generate 10 times as much power as it currently needs from wind energy...

a widely applied and IEC-standardized metric, the short-term flicker indicator (PstLM) is used. This metric is derived from the short term flicker severity...

grid, the short circuit ratio (or SCR) is the ratio of: the short circuit apparent power (SCMVA) in the case of a line-line-line-ground (3LG) fault at the...

To address this, the Navy developed the concept of the pilot direction indicator, or PDI, an electrically-driven pointer that the observer used to indicate...

dust, can be used as an indicator of past atmospheric circulation patterns. Without the presence of the monsoon, surface winds across the globe would have...

spectrometer – MKh-6411 penetrometer / regolith ohmmeter – PrOP-V chemical redox indicator – Kontrast 2 color telephotometer cameras – TFZL-077 gas chromatograph...

Hα surface brightness-radius relation: a robust statistical distance indicator for planetary nebulae", Monthly Notices of the Royal Astronomical Society...

damage indicators in the largely-rural area west of Oklahoma City. During the Greenfield, Iowa EF4 on May 21, 2024, Doppler on Wheels recorded wind speeds...

sheets of ice floating on an ephemeral winter pond move and break up due to wind. Trails of sliding rocks have been observed and studied in various locations...

with the axis of rotation of an astronomical body; that is, a star whose apparent position is close to one of the celestial poles. On Earth, a pole star...

range of wind direction. For example, 21010KT 180V240 suggests the wind was variable from 180° to 240° at 10 knots.: 10  Immediately after the wind direction...

T.; Lamb, W. F.; et al. (2024). "Indicators of Global Climate Change 2023: annual update of large-scale indicators of the state of the climate system...