Radar

[Macgregor the Hammer]

Originally Posted by KaleunMarco

so, the SJ performance that i experienced is normal for WWII?

i thought that radar could perform regardless of the weather, even in WWII.

Even today, heavy snow, rain and fog wreaks havoc on radar performance. That being said, not detecting a target until it's at 4000 yds. is rather strange. The radar antenna is not that high on the mast and if the boat is pitching in rough seas, yet another problem

The questions that come to mind:

Are you depending on your radar operator or interpreting the sweep yourself?

Are you using the PPI or A scope? Once you know what to look for, the A scope can give you much more accurate data. You can manually sweep the antenna using the home/end keys to zero in on a 'tent' in the weeds. I always wished SH included a J scope display. Much easier to interpret and very accurate. I guess radar is not radar unless you have the circular sweep.

Here's and apples to apples with the German sets:

SJ SJ-1 Characteristics:
Range: Varies with target: SJ ~8 miles SJ-1 ~12 miles
Peak Output Power: SJ 20Kw SJ-1 50Kw
The average expected error in range measurement: +/- 15 yards plus 0.1% range to +/- 40 yds
The average expected error in bearing measurement: is from +/- 2 to +/- 4 mils (+/- 1/10 degree to +/- 1/5 degree)


FuMO 30 Submarine Surface Search Characteristics:
Frequency: 368Mhz
Range: 6-8KM
Average Bearing Error: 100m
Accuracy: +-5 degrees.