Rover Dive Notes Summary
P. McGill

Dive 1, Pt. Lobos, 11Jul06
* Accelerometers were on vehicle
* Descended at 36 m/min
* Rover moved on schedule
* Treads slipped on wheels, hung up on frame
* Comp oil levels way down
* Couldn't talk to modem, too noisy (no baffle on topside xducer)
* Emergency drop-weight release tough to pull, finally successful
* Lost drop weight

Dive 2, Pt. Lobos, 18Jul06
* Accelerometers were on vehicle
* Descended at 39 m/min
* Rover moved on schedule
* Oil seen leaking from motor shaft seals
* Successful acoustic drop-weight release

Dive 3, Atlantis, 6Aug06
* Descended at 32 m/min
* Observed with Alvin (Sherman, McGill)
* All moves successful
* Had acoustic comms, but burn wire didn't release weight
* Pulled manual release

Dive 4, Atlantis, 10Aug06
* Descended at ~40 m/min
* Observed with Alvin (Chase)
* All moves successful but turn failed
* Couldn't establish acoustic comms, topside xducer trailing ship
* Pulled manual release

Dive 5, Atlantis, 17Aug06
* Descended at ~40 m/min
* Observed with Alvin (Pargett)
* All moves successful
* Successful acoustic drop-weight release, burn time 12 min

Dive 6, Pt. Lobos, 18Dec06
* Launched w/out spar buoy by request of Lobos crew
* Descended at 39 m/min
* Software problem (task scheduling error), program didn't run
* First time with baffle on acoustic modem topside xducer?
* Successful acoustic drop-weight release, burn time 12 min

Dive 7, Pt. Lobos, 2Jan07
* Four cycled of drive 10 (?)m and raise and lower Stbd rack 
* rack limit was too high, did not penetrate sediment before hitting forward limit switch
* Tested and driving turning into the current
* Acoustically released drop weight, which was recovered by ROV
* Optode data showed signs of drift

Dive 8, W. Flyer, 31Jan07
* Descended at ? m/min
* Nav bad, could find Rover with ROV until searching for 1 hr 39 min
* Software problem (unitialized var), program didn't run
* Successful acoustic drop-weight release, burn time 11 min

Dive 9, W. Flyer, 2Feb07
* Descended at 36 m/min
* Rover mission software started in midwater, aborted acoustically
* Raised rack from down position acoustically so it wouldn't impact first
* First successful insertion/removal of BR chamber (stbd)
* Sediment switch sticking
* Successful turns into current
* First BR oxygen measurement, 36 hrs
* Chamber left in down position after measurement
* Successful acoustic drop-weight release, burn time 11 min

Dive 10, Pt. Lobos, 29May07
* Descended at 37 m/min
* First dive with both chambers, completed 3 cycles
* Port chamber switch not working, insertion hits bottom limit, lifts whole Rover
* Successful acoustic drop-weight release, burn time 12 min
* Fitting knocked off of stbd motor housing, lost lots of oil on recovery

Dive 11, W. Flyer, 7Jun07
* Descended at 37 m/min
* 2 successful cycles before starting long mission
* Bubbles released from port chamber when valves opened
* No ROV dive due to weather, drop-weight released acoustically, burn time 12 min
* Strobe beacon lens smashed during recovery

Dive 12, Pt. Lobos, 10Sep07
* Descended at 32 m/min
* Rover mission didn't start due to software bug
* Drop-weight released acoustically, burn time 12 min

Dive 13, W. Flyer, 20Sep07
* Descended at 36 m/min
* Stbd propulsion motor controller shut down with error after about 25 sec of motion, Rover drove in circles
* Drop-weight released acoustically, burn time 12 min

Dive 14, W. Flyer, 21Sep07
* Descended at 37 m/min
* Ran motors slower and increased current limit, stbd propulsion motor controller didn't shut down, all moves successful
* Stbd BR chamber valves not working (kinked hose?)
* Neither ring manifold nor single nozzle chamber cleaner was very effective
* Ref optode data somewhat noisy, but don't know what is normal for ambient water
* Successful 36-hour incubation on port chamber
* Drop-weight released acoustically, burn time 12 min