Table of ABE dive sections by F. Stahr (stahr@ocean.washington.edu)
Flow Mow cruise, 3-21 Aug 2000, R/V T.G. Thompson
Notes:
1) All times are given in seconds of "ABE time" which starts with seconds-UTC-day-of-dive and continues without interuption regardless of next day (i.e., becomes > 86400). These numbers were all picked by examining each dive's pressure, postition an d heading records. They were rounded to nearest second.
2) These segments all have 4hz records (some interpolated) of instruments-on data in abeXX_proc.mat, which includes abeXX.mat & sciXX.mat. Almost all have position data in variables x & y, except for the first parts of dive 47 and 50.
3) In my matlab scripts & plots, I will use the labels noted in the last column which includes section-abbreviation and pass# followed by dive# (e.g., top250 for second top of dive 50). Section names & abbreviations are: descent (dsc), at bott om on descent-weight mooring (mor), transition between sections (trn), north-side (nsd), south-side (ssd), east-side (esd), west-side (wsd), top (top), ascent (asc).
4) Dive notes incorporate the salient points of mine and Dana's together.
----------------------------------------------------------------------------
Dive # 42, deployment date/time(UTC) 7 Aug ~1750 (mjd 51763, yrday 220)
Plan: Imaginex survey at 40 mab
Results: got lost on 1st turn so most of dive @ 200mab, no Imaginex, no Eh, no MAVS, bad nose CTD, no Sontek (most instruments disconnected or off)
Time on bottom: 6.1 hours, Distance covered: 11.2 km
Section Start End FS label
On mooring 71874 72761 mor142
Transition 72761 74620 trn142
Top (200mab) 74620 94175 top142
Ascent 94175 95051 asc142
----------------------------------------------------------------------------
Dive # 43, deployment date/time(UTC) 9 Aug ~0600 (mjd 51765, yrday 222)
Plan: Imaginex survey at 40 mab
Result: mostly complete, but came up a little early due to hitting 3.6V threshold on batts, still bad Eh, bad MAVS, bad nose CTD, some Sontek?, good Imaginex
Time on bottom: 5.3 hours, Distance covered: 9.8 km
Section Start End FS label
Descent 23440 31481 dsc143
On mooring 31481 31725 mor143
"Top" @40 mab 31725 50950 top143
----------------------------------------------------------------------------
Dive # 44, deployment date/time(UTC) 10 Aug ~1535 (mjd 51766, yrday 223)
Plan: two tops section (300x700 m) at 75 mab, east to west in 20 m increments, shift 10 m, then 20 m spaced tracks to the east
Result: done completely, but bad Eh, bad MAVS, bad nose CTD, some Sontek?
Time on bottom: 9.9 hours, Distance covered: 22.0 km
Section Start End FS label
Descent 57459 65182 dsc144
On mooring 65182 65458 mor144
Transition 65458 66150 trn144
Top #1 (E-W) 66150 83418 top144
Top #2 (W-E) 83418 100940 top244
Ascent 100940 101738 asc144
----------------------------------------------------------------------------
Dive # 45, deployment date/time(UTC) 11 Aug ~1645 (mjd 51767, yrday 224)
Plan: south side, top at 75mab, north side
Result: completed all tracks, but bad Eh, bad MAVS, no nose CTD, some Sontek?, physically hit west valley wall 4 times while doing south side, once pretty hard (ding in nose)
Time on bottom: 7.9 hours, Distance covered: 15.1 km
Section Start End FS label
On mooring 67875 68217 mor145
Transition 68217 68580 trn145
South side 68580 73581 ssd145
Top (W-E) 73581 89534 top145
Transition 89534 91433 trn245
North side 91433 95985 nsd145
Ascent 95985 97191 asc145
----------------------------------------------------------------------------
Dive # 46, deployment date/time(UTC) 12 Aug ~1403 (mjd 51768, yrday 225)
Plan: north side, top at 75mab (length inc to 700 m), south side
Result: completed all tracks, bad MAVS, no nose CTD, some Sontek?
Time on bottom: 10.41 hours, Distance covered: 18 km
Section Start End FS label
Descent 58329 58702 dsc146
On mooring 58702 59025 mor146
Transition 59025 59485 trn146
North side 59485 66268 nsd146
Top (E-W) 66268 88230 top146
Transition 88230 88400 trn246
South side 88400 96180 ssd146
Ascent 96180 97179 asc146
----------------------------------------------------------------------------
Dive # 47, deployment date/time(UTC) 14 Aug ~0153 (mjd 51770, yrday 227)
Plan: top @ 75mab, 2nd top @ 100mab, vert thruster vs. speed test
Result: completed 1st top and 3/4 of 2nd but timed out before end of tracks due to bad navigation (noise from lower CTD pump, but only dive with both CTDs good), bad MAVS (still), bad Sontek?
Time on bottom: 12.0 hours, Distance covered: 25.2 km
Section Start End FS label
On mooring 14292 14609 mor147
Transition 14609 15340 trn147
Top#0 15340 18150 top047
Top #1 (75m) 18150 43088 top147 (note, no x,y positions until 18150)
Transition 43088 43390 trn247
Top #2(100m) 43390 57449 top247
----------------------------------------------------------------------------
Dive # 48, deployment date/time(UTC) 15 Aug ~0810 (mjd 51771, yrday 228)
Plan: top @ 75mab, vert thruster vs. speed test
Result: all complete including thruster test at end, failed 'come home' ping test, no nose CTD, MAVS on separate battery & logging, got 5.5hrs data @ ~4hz
Time on bottom: 6.2 hours (not inc thruster tests), Distance covered: 11.7 km
Section Start End FS label
On mooring 37649 37852 mor148
Transition 37852 38620 trn148
Top (W-E) 38620 59343 top148
Ascent 59343 59706 asc148
----------------------------------------------------------------------------
Dive # 49, deployment date/time(UTC) 16 Aug ~0720 (mjd 51772, yrday 229)
Plan: top @ 75, (impending bad weather - use short window)
Result: all tracks, but no data from MAVS (software/operator error?) or from Sontek, which was turned into an Argonaut VR with special software
Time on bottom: 6.1 hours, Distance covered: 11.7 km
Section Start End FS label
On mooring 34172 34470 mor149
Transition 34470 35085 trn149
Top (W-E) 35085 56090 top149
Ascent 56090 56729 asc149
----------------------------------------------------------------------------
Dive # 50, deployment date/time(UTC) 17 Aug ~1723 (mjd 51773, yrday 230)
Plan: north side, top (75mab), south, east, west sides, top again
Result: almost all tracks, timed out with 1.3 tracks left on 2nd top. 10kHz xpndr off in software, so tracking was excellent except for small area in NW corner. MAVS logged @ 1/2 Hz, full record, some Sontek?
Time on bottom: 20.2 hours, Distance covered: 42.1 km
Section Start End FS label notes
On mooring 78097 78375 mor150 (no x,y data avail)
Transition #1 78375 79023 trn150 (no x,y data until after 78654)
North side 79023 85680 nsd150
Top #1 (W-E) 85680 107280 top150
Transition #2 107280 108732 trn250 (actually on south wall, just powering down)
South side 108732 112273 ssd150
Transition #3 112273 113331 trn350 (between south and middle of east wall)
East side 113331 128104 esd150 (113331 to 115230 still powering down, but on side)
Transition #4 128104 130495 trn450
West side 130495 134450 wsd150 (130495 to 131260 still powering down, but on side)
Top #2 (W-E) 134450 154803 top250
----------------------------------------------------------------------------
Dive # 51, deployment date/time(UTC) 19 Aug ~0715 (mjd 51775, yrday 232)
Plan: as many tops as possible, but flying E-W instead of N-S, box 700x240, start just south of mid-field, work north, then south, etc. with 20 m track spacing, bumped 10 m at ends for interlaced pattern. Box corners (used by CTD) UTM 492676 5311023, 4 92433 5310356, 492659 5310274, 492901 5310941
Result: nearly 5 complete passes consisting of 181 tracklines, aborted when one battery pack shut down on low voltage (3.0, MAVS logged @ 1/2 Hz, no Sontek
Time on bottom: 30.2 hours, Distance covered: 58.9 km
Section Start End FS label
On mooring 33747 33970 mor151
Transition 33970 34880 trn151
Top #1 (N 1/2) 34880 47904 top151
Top #2 (N-S) 47904 68603 top251
Top #3 (S-N) 68603 89174 top351
Top #4 (N-S) 89174 110522 top451
Top #5 (S-N) 110522 131373 top551
Top #6 (N 1/2) 131373 140403 top651