FRAC; Fracastoro; Fraccaro; Fraccaro, M. FRACDS; FRACGP; fracidin; FRACO; FRACOG; FRACP; FRACR; FRACS; fract-fract dos; Fractal; fractals; fraction; fraction collector; fraction of inspired oxygen; fractional; fractional dilation and curettage; fractional distillation; fractional excretion of sodium; fractional flow reserve; fractional injection; fractional oxyhemoglobin
In telecommunications, squelch is a circuit function that acts to suppress the audio (or video) output of a receiver in the absence of a sufficiently strong desired input signal. carrier squelch is unlocked and will let any signal in. Selective calling locks out all signals except ones with the correct code. In non-critical uses, selective calling can also be used to hide the presence of interfering signals such as receiver-produced intermodulation.
Depending on wind & circumstances and size of the vessel there can be hundreds even thousands of pounds of pressure on the sail and the line, so winches are an important tool for the sailor. Grinding (and tailing) is the act of rotating the winch handle to pull on the line inorder to tighten a sail. On larger sailing vessels, the crew operating the winch is often referred to as the Grinder. Because the winch wonât pull a line tight unless the line is tight on the winch, both grinding and tailing actions need to occur simultaneously. On the American Cup vessels (for example) while one person can do both actions, It takes two - or one person for each action when speed and every second counts.