From: David Scheel [mailto:dscheel@alaskapacific.edu]
Sent: Wednesday, September 26, 2001 9:01 AM
To: Paddy; Jason Douglas
Cc: Adele Lauster; Tye
Subject: What is active mission time


Jason,

It also occurs to me on re-reading previous e-mails in the archive
that "active" may mean different things to you and to me.  The
9-33 "active" mission time I obtained was from a paper where
"active" meant "away from home den."  That does not _necessarily_
mean moving very fast or very far, although what precisely it
does mean is not really known.

What is "active" to you?  Operating at full power, all moters going
all out and all lights ablaze, camera running, computer CPU at
100%?  Or motoring along at half-throttle?  Turning?

"Active" should probably be construed as holding position,
making minor movements of one to several meters every ten
minutes or so, with occaisional bursts of longer distance movement
on the order of 10 to 100 m.  During this "active" period, the camera
will be running; some power may be used for lights (perhaps about
50% of active time?).

In short, we need an analysis of the various parameters used to
estimate mission time, and which ones are most critical to get 
right.  THEN we can start to answer the question of "Is 9 h active
time enough?" and "How heavy can the sub be?"

David

p.s.  Sorry about earlier e-mail to "Doug" - I saw Douglas and forgot
it was your last name.