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Tide gauges have a practical application in the shipping and fishing industries where low or high tide levels can hinder or prohibit access to shallow bays or locations with bridges. An example is the Cascais tide gauge in Portugal, which was originally installed because of the sand bar in the River Tagus that causes difficulties for shipping ...
Not many fish around, come home, veering suggestively. That was the Shipping Forecast for 1700 hours, Wednesday 18 August. The BBC Radio 4 monologue sketch show One features a number of Shipping Forecast parodies, written by David Quantick and Daniel Maier , such as the following, originally broadcast on BBC Radio 4 on Thursday 21 February 2008:
Many fishing fleet owners objected to the posting of gale warnings, which required that fleets not leave the ports. Under this pressure, FitzRoy's system was abandoned for a short time after his death. The fishing fleet owners reckoned without the pressure of the fishermen, for whom FitzRoy had been a hero responsible for saving many lives.
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.
The changing height of the mercury in the barometer was recorded on a continuously moving photosensitive surface. [5] By 1847, a sophisticated temperature-compensation mechanism was also employed. Ronalds’ barograph was utilised by the UK Meteorological Office for many years to assist in weather forecasting and the machines were supplied to ...
When using pulsed DC for fishing, the pulse rate and the intensity of the electric field strongly influence the size and nature of the catch. The conductivity of the water influences the shape and extent of the electric field and thus affects the field's ability to induce capture-prone behavior in the fish. It can also cause injury to the fish.
By fishing vessels near fishing grounds: "I am hauling nets." Longitude (The first 2 or 3 digits denote degrees; the last 2 denote minutes.) H Hotel [hoʊˈtɛl] "I have a pilot on board." [b] I India [ˈɪn.dɪə] "I am altering my course to port." [b] J Juliet [ˈdʒuː.ljɛt] "I am on fire and have dangerous cargo on board: keep well clear ...
Anadromous – fish that live their adult lives in the ocean but migrate up fresh water rivers to spawn. Examples are Pacific salmon. Fish that migrate in the opposite direction are called catadromous. Anoxic sea water – sea water depleted of oxygen. See hypoxia. Anoxic sediments – sediments depleted of oxygen.