By David W Nellis

ISBN-10: 156164191X

ISBN-13: 9781561641918

ISBN-10: 1561641960

ISBN-13: 9781561641963

Книга предназначена тем, кто интересуется удивительной и постоянно меняющейся зоной, где море встречается с сушей, и кто хочет знать виды птиц, использующих эту зону во Флориде и более южных островах. Автор Дэвид Неллис рассказывает о птицах, которые встречаются на пляжах, в мангровых зарослях и даже на скалах Карибских островов. Из множества птиц, которых можно встретить на побережье, Неллис выделил seventy two наиболее обычных вида, включая нескольких более редких, но привлекающих наше внимание. Около 250 фотографий, большей частью сделанных автором, показывают различные черты этих птиц и их местообитания.
Доп. информация: Файл является рипом с сайта Google Books. Этим определяется отсутствие некоторых страниц (до 20% от общего числа) и невысокое разрешение сканирования (около a hundred dpi). Образец страницы
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The true bearing is always written on the chart so it will be possible to calculate what the magnetic bearing should be as you enter the harbour. If this is compared with the actual reading on the compass then deviation can be calculated. Example using Fig. 11 As we enter this small harbour for the night, we notice that the steering compass reads 323°M when the leading lights are in line. Later in the chapter we will look further into the calculations for deviation. Hand bearing compass error It is impossible to accurately estimate the deviation suffered by a hand bearing compass as it is easily moved closer to, or away from, magnetic influences.

2The scanner which is mounted where it has a clear view of the horizon. ◆ The scanner The scanner revolves at about 25 revolutions per minute and sends out short bursts of microwave energy known as the radar ‘beam’. If this beam is interrupted by a solid object the beam is reflected back to the set where it is enhanced and displayed as a contact on the display screen. The contact’s distance and bearing relative to the ship’s head is also given. 14 Radome and open array radar scanners. 14, or enclosed in a fibreglass radome.

SATELLITE BASED AUGMENTATION SYSTEMS – WAAS AND EGNOS When the Global Positioning System was first introduced by the USA, it gave an accuracy of about 15 metres for 95% of the time. While this level of accuracy was acceptable for offshore shipping, it was not suitable for landing commercial aircraft safely in poor visibility. As a result, a method was devised for refining the given GPS positions by using a network of ground stations and satellites to provide GPS signal corrections. This system is known as the Wide Area Augmentation System (WAAS) which claims a position accuracy of 3 metres 95% of the time.

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Common Coastal Birds of Florida & the Caribbean by David W Nellis


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