Last edited by Taurn
Saturday, February 1, 2020 | History

5 edition of Choosing & using ship"s radar found in the catalog.

Choosing & using ship"s radar

a brief guide

by Wylie, Francis James

  • 187 Want to read
  • 14 Currently reading

Published by American Elsevier Pub. Co. in New York .
Written in English

    Subjects:
  • Radar in navigation.

  • Edition Notes

    Statement[by] F. J. Wylie.
    Classifications
    LC ClassificationsVM480 .W9 1970b
    The Physical Object
    Pagination150 p.
    Number of Pages150
    ID Numbers
    Open LibraryOL4761323M
    ISBN 100444196897
    LC Control Number78108183
    OCLC/WorldCa73211

    Cloud echoes usually can be recognized by the operator by their fuzzy, hairy appearance on a type A indicator and by their nebulous, cloudy appearance on a PPI. How well a landmark shows up on the radar depends on its range and bearing, but a so called good target would be less sensitive to this. Enclosed Radome Scanners Radomes Enclosed Radome Scanners contain many of the same components as their open-array cousins, but all the moving pieces are housed inside an enclosure called a radome. Then as you proceed along the coast, just a quick look at radar screen tells if you are getting set in toward or away from the coast, or if you have wandered off course for any reason. A lifting of the air, the opposite of subsidence, usually occurs in such regions and it is accompanied by strong winds.

    If the pip is too sharply defined to allow ready recognition of the echo as a cloud contact, usually coordinating the target course and speed with wind data, along with position angle, will enable the echo to be evaluated properly. But all of the above principals don't change; the main advantage of modern high-def systems is in the software. If something moves straight up or down the screen, then it is pointing exactly the same direction as you but is going faster or slower respectively. Atop the pedestal is mounted a radar antenna or array. Detects surface craft in the event of failure of the surface search radar.

    However, if a duct is formed near the surface of the water, such evasive action will probably be unsuccessful. Radar equipment for submarines is primarily detecting equipment, but the surface search radar is capable of determining range and bearing accurately enough to control torpedo fire. Thus, continued calm weather or moderate breezes are necessary. The radar waves are, therefore, not bent away from a straight path by the same amount at every point along their travel, nor is the amount of bending constant with time. Indicates spots on shell splashes in both range and bearing, especially in ships that are not equipped with a fire control radar such as the Mark 8. If it moves inside the VRM it is getting closer.


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Choosing & using ships radar book

Note that in a seaway, the trails are often smeared out which makes a precise estimate more difficult. Since the effect of the duct indicated in figure 97 is to guide the radiated energy around the curvature of the earth and back again to the antenna, the radar is able to detect the ship at a range much greater than normal.

It provides the history of a radar set and its behaviour under different conditions and circumstances, and offers details which cannot be discussed in a short time.

Since more of the pulse energy can get to the target by two paths than by one, the echo is stronger, and a larger fraction of this stronger echo is returned to the radar by the two paths than if there were no reflection taking place from the water.

To make a boat more visible by radar, many boat owners add radar reflectors aloft. Surface search radar is able to detect both vessels on the surface of the ocean and low flying planes, but it is unable to detect aircraft at high altitudes.

The VRM will now not be touching any land, but you can see the lay of the coastline lower on the screen. The frequencies used for radar are so high that atmospheric noise, or static, has little effect on its operation. You'll find that there's usually quite a lot missing in the radar image, owing to the two-dimensional illumination of the surroundings with your boat at the center of the display.

For conditions shown in D, there will be echoes from very remote surface targets or land, but not from targets at intermediate ranges. You reach across the helm and push the standby button once. Radar will not detect ships beyond visible range on clear days.

Beyond this simple, measurable information the pips do not, of themselves, reveal any further data. But this is not a simple matter of just looking at the radar screen. However, it is often not possible to tell which side a target will pass if it is seems to be coming straight at you - it's directly ahead, or on a constant bearing.

Non-standard propagation of this sort reduces the radar coverage instead of increasing it. Consequently, it was feared that the existence of trapping would cause a great decrease in coverage in the area above the duct. Tuning the Radar Read the system manual, also read other system manuals for additional insight.

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A beam of this sort is desirable also because it minimizes ground and sea clutter on shipboard installations. It is important to not run this filter too high or you will lose small or even medium sized close targets.

For example, search equipment is available for air search, height-finding and low-angle search, and surface search. Put your cursor over the boat you want to track and press the acquire target button. The next limitation to add into the mix is electrical limitation, which is yards for each microsecond of pulse length.

Offset or shift relocates the center of the display away from your own position so you can concentrate on a specific region. This factor is of minor importance for long-wave radars because of the great extent and relatively small numbers of the lobes in the antenna pattern.

Obtains meteorological data by observing the movements of balloons equipped with radar reflectors. Generally use Heads Up mode. Until it's within 9. In a formation of many planes, for example, the echo will spread over a long range, and on the A scope it will have many peaks.

Set the optimum range and then use a portable range scale to check it.Dec 06,  · How the U.S. Military’s New Ship-Killing Missile Turns Targets' Radar Against Them and uses an active radar system to detect enemy ships. Day and night systems from Raymarine keep you aware of surrounding traffic, hazards, rain sea birds and much more.

From compact and lightwight digital radomes, to ultra-high performance Super HD Colour open arrays, Raymarine has the perfect marine radar solution for every boat. This Radar for Dummies explains what we learned about using radar and interpreating radar output.

the instruction manual for our Raytheon radar system; and the book "Radar Afloat" by Tim Bartlett. Table of Contents for this Article speed, and aspect of the radar traffic. The more complex operations, such as choosing the change of course.

When caught out in fog, squall or cover of darkness, there is no better friend to place on lookout. The sweep of a radar displays real time distance and range to any reflective target, meaning it will detect ships, land masses and most navigation aids.

Using electromagnetic waves, a radar sees through any condition of visibility. How It Works. Radars are eyes of the navigator. More so in these days when we rely more on radar for look out than on our eyes.

But using the radar without proper settings would mean having a look out with half closed eyes. Setting up the radar in a way to have all the targets plotted perfectly is as. The most remarkable effect of such trapping is the extreme ranges that have been obtained as a result of it.

Ships using megacycle search equipment have detected land at ranges between and miles, and rather small ships have been detected at ranges up to 50 miles.