The choice of working scales when working with the radar &quot;Neptune&quot;
Sea swell does not in itself reduce the detection range of objects, but it does not allow them to be recognized against the background of echo signals from waves. Strong excitement illuminates the screen within 3-4 miles, therefore, objects whose detection range lies within these limits cannot be detected and highlighted on the indicator screen.
Also, the objects that are within this zone, but have a much greater detection range, are not always highlighted on the screen. You need to have sufficient observation experience to distinguish them by the different intensity of the echo signals. Excitement drastically reduces, and a strong one makes it impossible to detect almost all ice formations on its background (excluding large icebergs and smooth ice fields, since the latter are even better detected on the background of waves).
With the skillful use of radar controls, it is possible to reduce to some extent the influence of disturbances created by sea waves, and to somewhat improve the tactical capabilities of the station.
The choice of the station’s operating scale when navigating in ice and in the zone of a likely encounter with them depends on the specific conditions in which the ship is located. But in all cases, as well as when navigating in narrows, 1.5- and 5-mile scales are mainly used. The data obtained on the second scale, as a rule, serve to select the general direction of motion in thin ice, as well as for the radar determination of ice scores when navigating in limited visibility. For example, a 1.5-mile scale, IR-310 °. A caravan follows a polynya in small-sized ice 2–3 points. The edge of heavy ice is clearly visible in the vicinity of the vessel, and then the coastline is 2.7 miles away. The edge of heavy ice is also seen further. Clearly visible polynya. On the bow and stern it is difficult to distinguish the echo signals from the ships of the caravan. If the hummocky ice field on the left gives an echo signal and can be recognized, then the smooth array of the ice field on the right does not give echo signals behind its edge and can easily be mistaken for pure water space.
The data of the 1.5-mile scale, due to its larger scale and increased resolution by bearing, allows us to classify ice, more accurately determine its magnitude, and also carry out radar navigation of the vessel in 1-2-point ice in the complete absence of visibility. Further, the same situation, but the scale is 1.5 miles. On the bow and stern are clearly visible echoes from the ships of the caravan, aside the ridged edge of the ice field. Behind the edge the ice is relatively smooth and almost does not give echo signals, it is quite possible to classify the ice and make radar wiring.
This example clearly shows a significant difference in the capabilities of the station, depending on the working scale. In each case, the choice of the working scale must be approached creatively, this will allow you to get what is missing at the moment with the help of the station. In one case, this may be a near-term perspective of movement, in the other, a classification or determination of the ice intensity. Play a huge selection of Vegas slots and other casino games online for free. You will get to experience all the thrills of real money slots for free free online slots no download with bonus rounds List of 1500 Free Online Slots with Bonus Rounds
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