Quote:
Originally Posted by karamazovnew
Cool method... I only have one small problem with it that might not bother others. The GPS  So I've just tried something cool and it worked.
I did all plotting far from my sub's icon, somewhere in the middle of the Atlantic. All plots were relative so I never had to convert stuff to true north. I never changed course, I'm not sure why Makman does it in his tutorial, as it's only necessary in the "sub stopped" technique. I only had to calculate how much "up" I went in the interval between readings, using the nomograph. After the 4'th bearing I had all data I needed. I then calculated a rough distance to get my eels into range. I had a sheet with turning radius of the boat and the time it took to complete a full 360 turn. I figured I only needed to change course and stop about 7 minutes later, at that speed. I did that, used the AOB technique to enter data into the TDC and get the 000 gyro bearing. To my horror I realized that I forgot to check where the target would be at that time, so it had already passed the sweat spot. Frantically, I did a quick check on the probable range when the target would be at bearing 340 and shot my eels when the target was at that bearing. 4 minutes later bum bum bum... I had never raised my periscope. Absolutely love it  |
hi Kara,
yea the gps(you mean the DIRECTIONS of hydro lines,right?) is annoying but i am afraid that is nessecery . the hydro station is totally unmodeled (another reason that i am saying that sh3 is not a sub simulator) and you can't get accurate (ok ...by 'accurate' i mean accurate to some level ,not exactly) hydro bearings. there are absolutely no tools that real station must had to measure the intensity of sound and narrow a little bit the peak of sound. also, there are other problems with the 'sonarman' . the moment he says 350 degrees the target is either to 349,5 or to 350,5 degrees(really....why devs have made simple things ..so complicated without a reason?). that's ok (can be overpassed) if the report happens to be asked exactly at the time he screams the new hydro bearing. but if the time is not at this moment then all you know is that target is somewhere between 349,5 and 350,5 .nothing can be done,afaik, to narrow this..so if you don't use the gps for hydro line you have to expect big inaccuracies ( as travelled distances getting bigger so inaccuracies getting bigger).
also there is one more (little this time) thing that annoyes me with sonarman . he doesn't answer immediatelly for reporting . sometimes he is quick and others not so we have some 'lose' from that too and if you add the inaccuraces becuase of the fact that drawings will take place at small zoom of navmap ....i think that all these will lead to a final solution which will be very off if not ...totally off !
so , at video ,i am pretending that sonarman has all these tools at his station for narrowing the peak of sound ( yea,i know ....now he 'narrows' it at a extreme level but do we have a better choice?) and giving me accurate directions for hydro lines.
would be nice, though, to know if there is a workaround for plotting accurate (as possiple) hydrolines without the gps.
or even better (just for me is this ) : can we tweak somehow the sonarman's reports and gives an output with the 'half' first demical ?? something like ''bearing: 340,5 degrees'' when target is between 340 and 340,5 degrees or 'bearing: 341 degrees'' when target is between 340,5 and 341 degrees.
then gps will not be needed and accuracy will not be 100% which ,i think , is 'closing' to reality.
about no course's changes : no ,this is wrong Kara.if we assume that you don't change course and speed (in order to be able to make the 'up going' plotting ) from the start of the procedure ,then the fourth bearing is ,in fact, the 'red line' (if we assume that you did all correct).so you will have 'problem' there as both lines(fourth bearing and 'red line') will be the same line. the goal is to avoid parallel hydro lines ...each other or with the 'red line' .thats why i changed course .or you can change speed (instead of course) between time intervals.(but whatever you do ....something must be changed either course or speed or...both).
sure it is not nessecery to use your scope ! i used it only to get an accurate speed for target . but if you don't use it you have to be based on your map plotting for getting the target's speed and becuase it will be a little off (target's course 'error' is causing this) you must use a greater angle at your 'salvo' shooting in order to get him for sure .
also , as you are going to shoot from hydrophone i want just to point out that we fire at target when we start 'hearing' him ...10 degrees in FRONT of the decided shooting bearing.