SUBSIM Radio Room Forums - View Single Post - New bearing overlay REQUEST tool for those who Navigate Manually

dertien · 01-02-07, 11:36 PM

Hello Everyone

I have started to sail SH3 the hard way, not using the waypoint tool anymore, but doing 'sextant' sightings if the weather permits in the morning and at dawn, and I update my position manually. This is superb in points of realistic navigation, but my dear Bearing Overlay, which I used to calculate a target's speed, was updated with a transparent one that didn't give the position of my u-boat away on the map.

Since I found the stock ruler that came with SH3 too inaccurate to use with Wazoo's excellent 3'.15'' targeting method, I kitbashed something myself, using Jiim's or Wazoo's ruler mod compass.

The result is the Precise Range Ruler or PRR for short.

I made Jiim's ruler somewhat bigger, about 350 px, added some range rings in the middle being 0, 50m, 100m, 150m, 200m and 250 meters.
This looks like this

Ingame it looks nicely transparent, now how does it work.

This mod provides three tools:

-The advanced ruler (Jiim's or wazoo's) you'll find it on the navmap (F5) by clicking the ? and then the

-The same advanced ruler when clicking the

-Finally My PRR tool when clicking the

Now how does it work ?

Using Wazoo's manual targeting tutorial in short this is what you do to get a target's speed:

[ CORRECTED BELOW 1) IMPORTANT: you must BE at a dead stop or going 1 knot (no engines running).]
1) You must NOT be at dead stop, you simply put a mark of the u-boats estimated position on the map after 3'15'' and you draw your bearing line to the target from there, instead from the same mark when at dead stop. Thank you Johnnyblaze for this info.
2) Using the stadimeter in the periscope write down (yes! on a piece of paper!) the range and the bearing of the target followed immediately by a click on the chronometer./ Do this again after 3'15'' and write down the range and bearing of the target again.

Now calculating target speed:

3)Go to your navmap choose a zoomrange and stick to it !!!

If you're going to use the PRR to mark down 1250 meters, in 5 consecutive steps of 250 meters, you'd better not zoom out on the map during your second markings when the target range is 1750 meters.

Now simply take your time (really there's no rush) use the line tool to draw Bearing 1 and then the compass tool to draw Bearing 2 on the navmap. I don't use twice the same ruler, because they 'interfere' with each other if you want to draw on the initial point a second time. Using two different tools avoids that.

Last but not least, use the PRR to mark down in steps of 50/100/150/200/250 the first and second range on both bearing lines using the same zoomrange, I can't stress that enough.

Connect your last two markings with a line and measure it again with the PRR range circles, making marks as you go. The lenght of your line is the target's speed in knots. Observing a target going 800 m during 3'15'' will give you a speed of 8 knots, 850 m = 8.5 knots and so on. Try it, it works and even on very far targets !

Enough ranting, here's the mod

http://files.filefront.com//;6469251;;/

01-02-07, 11:36 PM	#1
dertien Lieutenant Join Date: Apr 2005 Location: Antwerp Belgium Posts: 259 Downloads: 130 Uploads: 0	Precise Range Ruler mod available (for those who hardcore Manual Navigators) Hello Everyone I have started to sail SH3 the hard way, not using the waypoint tool anymore, but doing 'sextant' sightings if the weather permits in the morning and at dawn, and I update my position manually. This is superb in points of realistic navigation, but my dear Bearing Overlay, which I used to calculate a target's speed, was updated with a transparent one that didn't give the position of my u-boat away on the map. Since I found the stock ruler that came with SH3 too inaccurate to use with Wazoo's excellent 3'.15'' targeting method, I kitbashed something myself, using Jiim's or Wazoo's ruler mod compass. The result is the Precise Range Ruler or PRR for short. I made Jiim's ruler somewhat bigger, about 350 px, added some range rings in the middle being 0, 50m, 100m, 150m, 200m and 250 meters. This looks like this Ingame it looks nicely transparent, now how does it work. This mod provides three tools: -The advanced ruler (Jiim's or wazoo's) you'll find it on the navmap (F5) by clicking the ? and then the -The same advanced ruler when clicking the -Finally My PRR tool when clicking the Now how does it work ? Using Wazoo's manual targeting tutorial in short this is what you do to get a target's speed: [ CORRECTED BELOW 1) IMPORTANT: you must BE at a dead stop or going 1 knot (no engines running).] 1) You must NOT be at dead stop, you simply put a mark of the u-boats estimated position on the map after 3'15'' and you draw your bearing line to the target from there, instead from the same mark when at dead stop. Thank you Johnnyblaze for this info. 2) Using the stadimeter in the periscope write down (yes! on a piece of paper!) the range and the bearing of the target followed immediately by a click on the chronometer./ Do this again after 3'15'' and write down the range and bearing of the target again. Now calculating target speed: 3)Go to your navmap choose a zoomrange and stick to it !!! If you're going to use the PRR to mark down 1250 meters, in 5 consecutive steps of 250 meters, you'd better not zoom out on the map during your second markings when the target range is 1750 meters. Now simply take your time (really there's no rush) use the line tool to draw Bearing 1 and then the compass tool to draw Bearing 2 on the navmap. I don't use twice the same ruler, because they 'interfere' with each other if you want to draw on the initial point a second time. Using two different tools avoids that. Last but not least, use the PRR to mark down in steps of 50/100/150/200/250 the first and second range on both bearing lines using the same zoomrange, I can't stress that enough. Connect your last two markings with a line and measure it again with the PRR range circles, making marks as you go. The lenght of your line is the target's speed in knots. Observing a target going 800 m during 3'15'' will give you a speed of 8 knots, 850 m = 8.5 knots and so on. Try it, it works and even on very far targets ! Enough ranting, here's the mod http://files.filefront.com//;6469251;;/ __________________ If you have an apple and I have an apple and we exchange apples then you and I will still each have one apple. But if you have an idea, and I have an idea and we exchange ideas each of us will have two ideas. G.B.Shaw Last edited by dertien; 01-06-07 at 08:04 AM.