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  2. Water metering - Wikipedia

    en.wikipedia.org/wiki/Water_metering

    Residential meters: 5/8 inch (commonly referred to as "5/8 x 3/4 inch"), 3/4 inch, and 1 inch. [ 8 ] Commercial/Industrial meters: Sizes range from 1½ inches to 12 inches or larger, depending on flow requirements and system design.

  3. 2-inch RP - Wikipedia

    en.wikipedia.org/wiki/2-inch_RP

    A Sea Vixen with underwing 2-inch rocket pods between drop tanks and Firestreak air-to-air missiles. The 2-inch RP, short for Rocket Projectile, 2-inch, Number 1 Mark 1, was an unguided rocket weapon developed by the Royal Navy in the 1950s. It is generally similar to contemporary rockets like the SNEB and FFAR, although somewhat smaller.

  4. Positive displacement meter - Wikipedia

    en.wikipedia.org/wiki/Positive_displacement_meter

    A positive displacement meter is a type of flow meter that requires fluid to mechanically displace components in the meter in order for flow measurement. Positive displacement (PD) flow meters measure the volumetric flow rate of a moving fluid or gas by dividing the media into fixed, metered volumes (finite increments or volumes of the fluid).

  5. Depth sounding - Wikipedia

    en.wikipedia.org/wiki/Depth_sounding

    A sailor and a man on shore, both sounding the depth with a line. Depth sounding, often simply called sounding, is measuring the depth of a body of water.Data taken from soundings are used in bathymetry to make maps of the floor of a body of water, such as the seabed topography.

  6. Nautical chart - Wikipedia

    en.wikipedia.org/wiki/Nautical_chart

    On nautical charts, the top of the chart is always true north, rather than magnetic north, towards which a compass points. Most charts include a compass rose depicting the variation between magnetic and true north. However, the use of the Mercator projection has drawbacks. This projection shows the lines of longitude as parallel.

  7. Metre sea water - Wikipedia

    en.wikipedia.org/wiki/Metre_sea_water

    The unit used in the US is the foot sea water (fsw), based on standard gravity and a sea-water density of 64 lb/ft 3. According to the US Navy Diving Manual, one fsw equals 0.30643 msw, 0.030 643 bar , or 0.444 44 psi , [ 1 ] [ 2 ] though elsewhere it states that 33 fsw is 14.7 psi (one atmosphere), which gives one fsw equal to about 0.445 psi.