Radar Navigation ManualDefense Mapping Agency, Hydrographic/Topographic Center, 1979 - 274 sider |
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Side 13
... provide more time between transmitted pulses . The PRR must be high enough so that sufficient pulses hit the target and enough are returned to detect the target . The maximum measurable range , assuming that the echoes are strong enough ...
... provide more time between transmitted pulses . The PRR must be high enough so that sufficient pulses hit the target and enough are returned to detect the target . The maximum measurable range , assuming that the echoes are strong enough ...
Side 15
... provides a reference for the timing of the travel of a transmitted pulse to a target and its return as an echo . Transmitter The transmitter is basically an oscillator which generates radio - frequency ( r - f ) energy in the form of ...
... provides a reference for the timing of the travel of a transmitted pulse to a target and its return as an echo . Transmitter The transmitter is basically an oscillator which generates radio - frequency ( r - f ) energy in the form of ...
Side 18
... the indicator . The receiver con- tains a crystal mixer and intermediate frequency amplification stages required for producing video signals used by the indicator . The primary function of the indicator is to provide a. 1-8 Reflector.
... the indicator . The receiver con- tains a crystal mixer and intermediate frequency amplification stages required for producing video signals used by the indicator . The primary function of the indicator is to provide a. 1-8 Reflector.
Side 19
... provide the means for operating various controls of the radar system . The CATHODE - RAY TUBE ( CRT ) , illustrated in figure 1-7 , is the heart of the indicator . The CRT face or screen , which is coated with a film of phosphorescent ...
... provide the means for operating various controls of the radar system . The CATHODE - RAY TUBE ( CRT ) , illustrated in figure 1-7 , is the heart of the indicator . The CRT face or screen , which is coated with a film of phosphorescent ...
Side 22
... provides the means for measuring and displaying , in a useful form , the relative bearings and distances to targets from which reflected echoes may be received . In displaying the positions of the targets relative to the reference ship ...
... provides the means for measuring and displaying , in a useful form , the relative bearings and distances to targets from which reflected echoes may be received . In displaying the positions of the targets relative to the reference ship ...
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Vanlige uttrykk og setninger
1817 LIBRARIES antenna beam width bearing cursor bearings and ranges cathode-ray tube circuit clutter course and speed CPA as determined Decca Radar detected direction of relative echoes electronic fixed range rings following radar bearings frequency heading flash heading line indirect waves Kelvin Hughes Linthicum Heights logarithmic scale Maneuvering Board MEGAHERTZ MICHIGAN microsecond minutes nautical miles navigational operation parallel-line cursor Plotting Sheet PPI display pulse length racon radar beam radar contact radar observer radar range setting radar set RADAR SHORELINE radarscope radiation range and bearing Range at CPA range scale setting rapid radar plotting receiver gain reflection plotter relative motion relative plot relative positions Reproduced by Courtesy reset risk of collision rotated set and drift ship as determined ship Course ship's position ship's speed ship's true course-speed solution switch tion traffic separation scheme transfer plotting true course true vector vector triangle vessel
Populære avsnitt
Side 2 - ... (c) Assumptions shall not be made on the basis of scanty information, especially scanty radar information. (d) In determining if risk of collision exists the following considerations shall be among those taken into account: (I) Such risk shall be deemed to exist if the compass bearing of an approaching vessel does not appreciably change...
Side 4 - When two steam vessels are crossing, so as to involve risk of collision, the vessel which has the other on her own starboard side shall keep out of the way of the other.
Side 111-108 - A vessel shall not cross a narrow channel or fairway if such crossing impedes the passage of a vessel which can safely navigate only within such channel or fairway.
Side 111-109 - A vessel nearing a bend or an area of a narrow channel or fairway where other vessels may be obscured by an intervening obstruction shall navigate with particular alertness and caution and shall sound the appropriate signal prescribed in Rule 34(e).
Side 4 - ... shall be deemed to be an overtaking vessel; and no subsequent alteration of the bearing between the two vessels shall make the overtaking vessel a crossing vessel within the meaning of these rules, or relieve her of the duty of keeping clear of the overtaken vessel until she is finally past and clear.
Side 3 - In a narrow channel or fairway when overtaking can take place only if the vessel to be overtaken has to take action to permit safe passing, the vessel intending to overtake shall indicate her intention by sounding the appropriate signal prescribed in Rule 34(c)(i).
Side 4 - A vessel which is close-hauled on the port tack shall keep out of the way of a vessel which is close-hauled on the starboard tack. (c) "When both are running free, with the wind on different sides, the vessel which has the wind on the port side shall keep out of the way of the other.
Side 2 - Alteration of course alone may be the most effective action to avoid close quarters provided that: (a) There is sufficient sea room.
Side 4 - When two steam- vessels are meeting end on, or nearly end on, so as to involve risk of collision, each shall alter her course to starboard, so that each may pass on the port side of the other.
Side 95 - A steam vessel hearing, apparently forward of her beam, the fog signal of a vessel, the position of which is not ascertained shall, so far as the circumstances of the case admit, stop her engines, and then navigate with caution until danger of collision is over.