688i's NB, that bad?

Ori_b · 07-01-06, 02:41 AM

Im experimenting with the mission editor, training myself with simple scenarios.
Ive noticed the fact that the NB display of the 688i will not show peaks (not even the tiny "is it there?" peak) although the frequency display shows quite clear lines.

BB display wont show lines in SHORT, only on INTERMEDIATE.

This was with a civil ship sailing at 5 knots at a 10.6nm.

Checked every array.

Change type of sub in the editor - All the other types of playble subs show peaks even in the BB display at this distance.

LuftWolf · 07-01-06, 02:58 AM

I've never noticed any problems.

Make sure you control for variable acoustic conditions between trial runs, even in the same mission run multiple times.

I've been fooled on several occasions by scenarios run multiple times, only to realize that the scenario was slightly different each time (layer at different depth, etc.).

Cheers,
David

sonar732 · 07-01-06, 08:14 AM

Quote:

Originally Posted by Ori_b

Im experimenting with the mission editor, training myself with simple scenarios.
Ive noticed the fact that the NB display of the 688i will not show peaks (not even the tiny "is it there?" peak) although the frequency display shows quite clear lines.

BB display wont show lines in SHORT, only on INTERMEDIATE.

This was with a civil ship sailing at 5 knots at a 10.6nm.

Checked every array.

Change type of sub in the editor - All the other types of playble subs show peaks even in the BB display at this distance.

Something that will help us is your depth. The 688 will show peaks, but at 10.6nmi away, they will be minimal if the sound conditions are right.

Ori_b · 07-01-06, 11:30 PM

My depth is 150m for Acula, Sw, 688I
75m for Kilo

Clear sea, very deep (17000+), bottom limited condition.

Continued my testing, started to see peaks at about 5nm! (and thats after i saw faint lines in TA BB.
Again, all this happenes while very bright lines can be seen in the freq display of the BB, its just a matter of running blindly with the cursor in the strength Vs azimuth display.

Ori_b · 07-02-06, 02:20 AM

Oops, i meant very bright lines can be seen in the frequency display of the NB of course.

Fish · 07-02-06, 04:07 AM

Quote:

Originally Posted by Ori_b

My depth is 150m for Acula, Sw, 688I
75m for Kilo

Clear sea, very deep (17000+), bottom limited condition.

Continued my testing, started to see peaks at about 5nm! (and thats after i saw faint lines in TA BB.
Again, all this happenes while very bright lines can be seen in the freq display of the BB, its just a matter of running blindly with the cursor in the strength Vs azimuth display.

Layer depth?

Ori_b · 07-02-06, 04:52 AM

Non excisting (Bottom Limited condition).

LuftWolf · 07-02-06, 06:01 AM

I can't repeat this on my computer. The NB is always properly sync'ed with the BB.

I suggest reinstalling and see if this makes any difference.

I've never seen this particular issue before.

07-01-06, 02:41 AM	#1
Ori_b Gunner Join Date: May 2006 Posts: 99 Downloads: 0 Uploads: 0	688i's NB, that bad? Im experimenting with the mission editor, training myself with simple scenarios. Ive noticed the fact that the NB display of the 688i will not show peaks (not even the tiny "is it there?" peak) although the frequency display shows quite clear lines. BB display wont show lines in SHORT, only on INTERMEDIATE. This was with a civil ship sailing at 5 knots at a 10.6nm. Checked every array. Change type of sub in the editor - All the other types of playble subs show peaks even in the BB display at this distance.

07-01-06, 02:58 AM	#2
LuftWolf Ocean Warrior Join Date: May 2005 Location: Free New York Posts: 3,167 Downloads: 2 Uploads: 0	I've never noticed any problems. Make sure you control for variable acoustic conditions between trial runs, even in the same mission run multiple times. I've been fooled on several occasions by scenarios run multiple times, only to realize that the scenario was slightly different each time (layer at different depth, etc.). Cheers, David __________________ LW

07-02-06, 06:01 AM	#8
LuftWolf Ocean Warrior Join Date: May 2005 Location: Free New York Posts: 3,167 Downloads: 2 Uploads: 0	I can't repeat this on my computer. The NB is always properly sync'ed with the BB. I suggest reinstalling and see if this makes any difference. I've never seen this particular issue before. __________________ LW

07-01-06, 11:30 PM	#4
Ori_b Gunner Join Date: May 2006 Posts: 99 Downloads: 0 Uploads: 0	My depth is 150m for Acula, Sw, 688I 75m for Kilo Clear sea, very deep (17000+), bottom limited condition. Continued my testing, started to see peaks at about 5nm! (and thats after i saw faint lines in TA BB. Again, all this happenes while very bright lines can be seen in the freq display of the BB, its just a matter of running blindly with the cursor in the strength Vs azimuth display.

07-02-06, 02:20 AM	#5
Ori_b Gunner Join Date: May 2006 Posts: 99 Downloads: 0 Uploads: 0	Oops, i meant very bright lines can be seen in the frequency display of the NB of course.

07-02-06, 04:52 AM	#7
Ori_b Gunner Join Date: May 2006 Posts: 99 Downloads: 0 Uploads: 0	Non excisting (Bottom Limited condition).