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Peter,
My approach is to use communications with surface support
to ask if all is clear for surfacing. But given the size of your subs, I'm
guessing you operate without anyone on the surface. That's a nice problem to
have...
:)
Alec From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Peter Madsen Sent: Monday, May 07, 2007 6:28 PM To: personal_submersibles@psubs.org Subject: [PSUBS-MAILIST] Collition with surface vessel Hi Psubbers,
When people talk of submarine safety the situation
most often assumed is a sub in distress on the seabed. This is of cause a very
critical situation,
and we all design boats that are redundant in many
ways so that we hopefully never get in that situation.
In my practical experience - however - getting hit
by a passing surface vessel when being at or very close to surface is a much
more likely incident. Depending on the speed and size of the vessel and
submarine any level of damage is possible - and the sub I likely to sink with
its pressurehull ruptured to some extent after the collision.
We are currently adding hydrophones to Kraka for
detection and classification of surface sound contacts, and we are designing a
cable camera for the UC3 - that can be send up prior to surfacing. We
hope these technical gadgets may make it more safe to operate our
subs.
The professionel submariners ( navy ) that I
have talked to say that they solely depend on their passive sensors - hydrophone
arrays - and they have zero way of detecting a drifting - stopped or sailing
vessel.
What do other non navy submarine operator do - how
do you psubbers handle this safety issue ? Most people ask me why we don't just
have an underwater radar ?! - or is it sonar - a sea surface hull detection
device...like the navy...
Well - what do you do ?
Regards,
Peter Madsen
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