Quote:
Originally Posted by razark
The bearing seems to be leading the target by about 3-4 degrees to clockwise most of the time
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If you can, always use optical bearings. It's 1000% easier to lock the scope and just use the radar for range. If you are tracking beyond visual range, then you need to measure radar bearing from the trailing edge of the radar beam, or in other words, sweep over the target then step back (mouse wheel) until you pick up the target again and that's the bearing the centre of the target is at.
Try these. I'd advise plotting with map contacts on if I were you, so you can see when you get it right. :
http://www.subsim.com/radioroom/down...o=file&id=1952
That's four radar training misisons and one TDC training mission all accessible from the Submarine School off the main menu. Each mission has full instructions in the mission brief:
Radar Training Part One.
In this mission the player will learn to read bearings from the radar train bearing indicator and match them to the bearing observed through the periscope or TBT.
OBJECTIVE 1: Use PPI Scope.
Use the PPI indicator to take quick readings of target bearings, matching them to visual observation. A rough estimate can be obtained by tracing through the centre of the blip to take a bearing and compare it to a bearing taken through the TBT. Note that the PPI indicator's bearing reading is quite rough and becomes harder to read the closer to the centre of the scope targets are. Note the position the beam has to be in to take a range reading.
OBJECTIVE 2: Use the 'A' Scope.
Use the 'A' scope to take accurate bearing and range information for each target and match it to the bearing observed visually through the periscope or TBT. Note that the 'A' Scope will show a pip for a sweep of approximately 9 degrees (NB: This radar arc was 5 degrees in real life). The train bearing indicator is located above the 'A' scope and can be used to read of both relative and true bearings to target, though on this version, the true bearings are too small to be accuratrely read and also have not been calibrated. Note that the pip on the 'A' scope for each target stays illuminated over several degrees. Make a note of the bearing range your 'A' scope reading gives you and match that to the visual observations taken through the TBT and stadimeter, if you wish to compare.
The 'A' scope is set up in what is known as a 'lobed off' configuration. The energy from the radar beam is directed out to one side of the radar antenna. In the current configuration it is lobed off to the right of centre. This is so that the edge of the thin radar beam can be used to detect the bearing of a target, rather than trying to judge when the pip is highest using the blunt end of the beam. The edge is much more sensitive and will give a greater degree of pip height change.
To get an accurate reading of the relative bearing of a target, read the bearing from the back edge of the contact. To do this, sweep the beam clockwise over the pip and when it disappears, step backwards using the mouse wheel (move the mouse wheel towards you) until the pip re-appears on the 'A' Scope. Look at the radar train bearing indicator and read off the relative bearing.
End the mission when you are comfortable reading ranges and bearing of static ships.
Radar Training Part Two.
In this mission the player will read the bearings from the radar train bearing indicator and the range of three seperate targets. The player will then attempt to sink them.
OBJECTIVE 1: Take the bearing and range.
Sweep with the radar and use the PPI scope to get an awareness of the number and rough positioning of the targets. Select one and obtain the range and bearing of the target using the 'A' Scope.
OBJECTIVE 2: Sink the ship.
Once you have the information, enter the bearing using either the UZO, the periscope or the sonar station. Enter the range using the stadimeter (you will need to have enabled manual targetting for this to be an option. Move the stadimeter, or simply click on the dial to drag the indicator round. You have have trouble with higher ranges, so you may need to set the target's height and then use the stadimeter button to move the split prisms blind, until you have the correct range indicated. Once the correct data has been sent to the TDC, fire a spread of torpedoes.
If you missed, try again, if you hit, congratulations. You can either end the mission or try to sink another.
Radar Training Part Three.
Weather report: CLEAR.
There are three targets in varying orders of difficulty. Your aim is to track each (one per time the mission is attempted) and then sink it.
Use Radar range and observed bearings through periscope (or radar bearings) to plot the course of the three target vessels. The tanker to the NW is a slow moving target and will be following the same course each time this exercise is attempted. The tanker to the NE is moderately fast moving and will follow a slightly different course each time this exercise is attempted. The target to the south is suspicious of submarine activity and will be zig-zagging. This last target will be the most challenging. See if you can identify its zigs.
Radar Training Part Four.
Weather report: HEAVILY OVERCAST and FOG
This is a recreation of the previous exercise, except conducted in heavy fog, so the only tool you can use is the sonar and radar, with visual observations unavailable. The exercise however should be conducted using the radar only to obtain bearings and range.
There are three targets in varying orders of difficulty. Your aim is to track each (one per time the mission is attempted) and then sink it.
Use Radar range and observed bearings through periscope (or radar bearings) to plot the course of the three target vessels. The tanker to the NW is a slow moving target and will be following the same course each time this exercise is attempted. The tanker to the NE is moderately fast moving and will follow a slightly different course each time this exercise is attempted. The target to the south is suspicious of submarine activity and will be zig-zagging. This last target will be the most challenging. See if you can identify its zigs.
Advanced Training:
Not for the faint hearted. A good radar operator will be efficient in the tracking and reading of data from multiple bearings. Use your radar skills to track and plot each of the three targets and produce a plot for each one. For an added challenge, do this in real time, without pausing time.
TDC Training Part One.
Weather report: CLEAR with LOW WIND.
This is the first TDC training mission. You will be positioned NNE of your target, a large modern tanker, which is steaming on a course NNW at approximately 12,000 yards (6 miles). The tanker is on a course of 338 degrees at a speed of 10 knots.
Practice using the TDC, with the details given above. As you know the target's course, you do not need to worry about eyeballing or drawing on the chart to work out the target's AOB. Use the TDC's target course entry dial to enter the course of 338 (making sure the AOB dial is selected in the periscope) and send this to the TDC. Then enter the speed of 10 knots and send that to the TDC. Finally, use the periscope to lock onto the target and then use the radar to measure the range as accurately as you can (make sure you have the stadimeter selected in the periscope view). When you have the range, send the data to the TDC. Now with the TDC having a complete solution, you can start the PK and the TDC should keep track of where the target is. As you have entered accurate information, the TDC should 'track' with the target. Wait several minutes and take a new bearing measurement from the periscope and a new radar range measurement and use these actual measurements to compare to the TDC's generated position. If you entered the details correctly, the measured and generated details should match.
Manouver as needed to sink the target. If you update the target's bearing, make sure to check that the target's course is still showing as 338.