Perisher mission 'Denmark Strait'

banryu79 · 03-02-15, 04:32 AM

Hello Tango589,
yesterdy afternoon I gave it a go at this mission, I haven't played much because I just spent a little more than half an hour running near the starting point at 4 knots and taking multiple periscope obs at the DDG ship and of course I plotted these obs on the NavMap. My aim is to carefully plot her track and understand her movements, and that's because I need to locate a precise spot for my approach that:
1) will be the fartest from the other (second) ship patrolling the strait.
2) will be roughtly 1 nmi from the DDG and will put me in her baffles (rougthly 120° astern, the ships are pinging) with her going away from me.
Think about where could lie such a point?

Also, I've done the search for you, look at this old thread:
http://www.subsim.com/radioroom/show...light=Perisher

Instead, I have another problem with this misison.
Are you able to take more or less precise range estimation with the stadimeter?
I found that even if a pause the game and take estensive time to perfectly (pixel precision) align the waterline with the higher mast top the range estimation is usually 1.8 nmi shorter than the real range (verified with Show Truth, obviously). I wonder if it could have anything to do with the depth of the boat, because in DW you cannot partially raise or extend the periscope, so the height of the periscope above the water is determined by the depth of the boat...

Relmu · 03-02-15, 08:04 AM

I'm almost certain that subsims very own had a video on the problems with the implementation of the Stadimeter. As far as I can tell myself, the height of the periscope has nothing to do with it.

Still I should probably take a look at the mission myself.

banryu79 · 03-02-15, 11:47 AM

Quote:

Originally Posted by Relmu

I'm almost certain that subsims very own had a video on the problems with the implementation of the Stadimeter. As far as I can tell myself, the height of the periscope has nothing to do with it.

Still I should probably take a look at the mission myself.

Thank you Relmu, in fact it looks like I should use highest superstructure and not highest mast, according to these threads I found:
http://www.subsim.com/radioroom/show...ight=Periscope
http://www.subsim.com/radioroom/show...ight=Periscope
FPSChalzly video was also helpful but for the issue regarding the orthogonal view of the ship you get in the scope VS the projection view of the 3D silouette/model you get to ID and estimate AOB...

Time to take the Perisher exam again!

Tango589 · 03-03-15, 06:31 AM

Thanks for the info!

03-02-15, 04:32 AM	#1
banryu79 Samurai Navy Join Date: Feb 2014 Location: Italy Posts: 554 Downloads: 82 Uploads: 2	Hello Tango589, yesterdy afternoon I gave it a go at this mission, I haven't played much because I just spent a little more than half an hour running near the starting point at 4 knots and taking multiple periscope obs at the DDG ship and of course I plotted these obs on the NavMap. My aim is to carefully plot her track and understand her movements, and that's because I need to locate a precise spot for my approach that: 1) will be the fartest from the other (second) ship patrolling the strait. 2) will be roughtly 1 nmi from the DDG and will put me in her baffles (rougthly 120° astern, the ships are pinging) with her going away from me. Think about where could lie such a point? Also, I've done the search for you, look at this old thread: http://www.subsim.com/radioroom/show...light=Perisher Instead, I have another problem with this misison. Are you able to take more or less precise range estimation with the stadimeter? I found that even if a pause the game and take estensive time to perfectly (pixel precision) align the waterline with the higher mast top the range estimation is usually 1.8 nmi shorter than the real range (verified with Show Truth, obviously). I wonder if it could have anything to do with the depth of the boat, because in DW you cannot partially raise or extend the periscope, so the height of the periscope above the water is determined by the depth of the boat... Last edited by banryu79; 03-02-15 at 07:46 AM.

03-02-15, 08:04 AM	#2
Relmu Watch Join Date: Feb 2015 Posts: 25 Downloads: 0 Uploads: 0	I'm almost certain that subsims very own had a video on the problems with the implementation of the Stadimeter. As far as I can tell myself, the height of the periscope has nothing to do with it. Still I should probably take a look at the mission myself. __________________ Dangerous Waters Score - Successes 30, Failures 190 ...oh boy.

03-03-15, 06:31 AM	#4
Tango589 Still crazy as ever! Join Date: Jan 2008 Location: A little south of sanity Posts: 3,375 Downloads: 180 Uploads: 1	Thanks for the info! __________________ Hanging on in quiet desperation is the English way...

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