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Stealhead · 02-06-12, 01:53 PM

You did say location had no effect though which is not correct if that position was out of the water.Like wise when they went to the WCA set from the older QC/JK as on the S-boat there was some concern about use of the active heads while near the bottom which was not an issue with the QC/JK deck location.The WCA and later heads where retractable but it was not uncommon for them to get damaged anyway.The other thing to take into consideration is that the sub would have to be fully submerged to get full use of any one of the various systems to get an accurate picture using sonar they needed the full ensemble and there fore had to be completely submerged.

The sonar heads you mention are the active ones the ones that ping they are not the passive "hydrophone" type that allow you to listen to screws in the water.If you look at that link I posted you'll see that there where two active heads on the keel and one for sounding depth and the passive head is above the deck the JT head.

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02-06-12, 01:53 PM	#30
Stealhead Navy Seal Join Date: Feb 2009 Location: Kentucky Posts: 5,421 Downloads: 85 Uploads: 0	You did say location had no effect though which is not correct if that position was out of the water.Like wise when they went to the WCA set from the older QC/JK as on the S-boat there was some concern about use of the active heads while near the bottom which was not an issue with the QC/JK deck location.The WCA and later heads where retractable but it was not uncommon for them to get damaged anyway.The other thing to take into consideration is that the sub would have to be fully submerged to get full use of any one of the various systems to get an accurate picture using sonar they needed the full ensemble and there fore had to be completely submerged. The sonar heads you mention are the active ones the ones that ping they are not the passive "hydrophone" type that allow you to listen to screws in the water.If you look at that link I posted you'll see that there where two active heads on the keel and one for sounding depth and the passive head is above the deck the JT head.