Cruise Planning Questionnaire


Ship: ATLANTIS
    Vehicle(s) required:
Jason/Medea
    Name of ship for ROV ops:
ATLANTIS
    Ch Sci:
James Mercer
    Affiliation:
University of Washington, Applied Physics Laboratory
    Address:
1013 NE 40th St.
Seattle, WA 98105
    Phone:
2065431361
    Email:
mercer@apl.washington.edu
    POC / contact info:
Departure port & date:San Diego, 06/23/2008
    Distance to first station:
768 km
    Number of stations:
1
    Distance between stations:
0
    Total days on station:
2
Arrival port & date:Astoria, OR, 06/29/2009
Op area:
Lat/Lon:37 20.9275N/123 26.4575W
Depth range:900 m
    Will the vessel be operating within 200 NM of a foreign country?
    Which country?
    Are visas or special travel documents required?

Funding agency:
      ONR/Navy
Specify:

Grant or contract number: N00014-03-1-0181

    Science objectives/activities planned:
Recover acoustic transducer from ocean floor in 900 m of water

WHOI shipboard scientific instrumentation desired:
    12 kHz bathymetry system
ADCP - 75 KHz
    3.5 kHz bathymetry system
    Relay transponder for wire use
Pinger for wire use

Is nighttime work anticipated on this cruise? Yes

    Critical MET sensors:
    Critical CTD sensors:

Do you need Seabeam? (AT and KN only) Yes

Long baseline (LBL) transponder navigation? No. of xpndrs/nets:
Ultra-short baseline (USBL) navigation?
Doppler/GPS navigation?

Will you be using portable science vans? Yes How many: 1


Science Van #1
Science Van #2
Science Van #3
    Type/size
10 foot tool van
    Location
accessible
    Water
no
    Power
no

Anticipated standard oceanographic cable use:

Instruments(s)
Instrument Weight(s)
Maximum Depth
    Conducting hydro
    Steel hydro
    Steel trawl
    .681" fiber optic
    Do you require slip rings?
Number of conductors:
    Do you need non-standard wire?
If so, what type?
    Do you need a traction winch?
Will you be bringing any equipment (winches, blocks, etc.) that lowers equipment over the side? Yes

If yes, please provide details: Lantec series 750 winch
with the -163 drum. The rated pull is 60,000# at the core (60,000 lb-ft
torque). I spoke with the manufacturer and their basic design guide line for
the internals (gears, brakes, shafting, hydraulic pressures, etc is a factor
of safety of 3) so the winch will not let go with a 180,000# (180,000 lb-ft)
load a the core. We expect to be at no greater drum diameter than 38" with
the 4000 ft of .75" dia Spectra. Taking the Spectra at 60,000 # BS x 150% at
the 38" loaded diameter I get 142,500 ft-lbs (max possible applied load plus
150% rating) with is less than the rating of the winch. If however one uses
the load capability of the winch with the ratchet and dog (that our rental
winch has) the winch load rating goes to about 10 times working per the
manufacturer. That is far beyond any applicable load. Again the anticipated
working load on the line is not expected to exceed 12,000# plus surge.


The next sketch shows an elevation view in the plane of the load and the
line is leaving the winch at a 30 deg vertical angle (actual should be
considerably less than that) giving a moment arm of 62" about the aft bolt
group. If one takes the breaking strength of the Spectra x 150% (90,000#)
and assumes the load is at one edge of the winch drum (so the 2 bolts see
all the tension and one pad only is loaded) the tension on the 1.5" dia
bolts and 1" pad bolts is 90,000# x 62"/46"(ave length) gives 121,300# total
on the bolts (again all the load on one side of the winch base only)
The grade 5 bolts are good for 105,000 psi (ultimate) so the 1" can
withstand 63,500# ea and the 1.5" at 147,000# ea so the 4 ea 1" in the pads
can hold 254,000# and the 2 ea 1.5" thru the winch base can hold 294,000# -
both in significant excess of the 121,300# that could be applied (with 150%
factors of overload and all one side).
The shear loads are relatively small 90,000#/9.68 in2 (9,300 psi average
16 bolts) for the 1" bolts and 90,000#/11.2 in2 (8,000 psi average 8 bolts)
for the 1.5" dia bolts. Significant torque on these bolts would generate
enough friction to carry all the shear load.
The choice of bolting the winch directly to the pads vice welding tapped
bars to the pads is to eliminate the problems of a certified welder and the
time and cost for that. Drilling 8 ea x 1.5" dia holes in 1" think plate is
not insignificant but is done with a coring bit on a magnetic base drill in
a short time by APL staff. Then there is no question as to weld quality,
amount, alloy used, etc.
The attached pdf's show the mounting hardware - basically the Lantec winch
will mount with 8 (2 in each "corner" of the winch base) 1.50 dia grade 5
bolts to the 4 plates and each plate will be bolted down with 4 ea 1.0 dia
grade 5 bolts. Coming in another email/pdf's is a layout and load lines for
the winch and a further description of the winch.
There will be a few tapped holes in the plates to temporarily install
lifting eye bolts to move and position the 250# ea plates with a crane.
(Figures have been provided separately.)
Will there be special requirements for:

    Electrical power
    Equipment handling
Yes
    Inter/intraship communications
    Science stowage

If yes to any of the above, please identify: Require ship's crane and A-frame

Will any of the following items be used on board?

    Explosive devices
No
    Portable air compressors
Yes
    Flammable gases
No
    Radioisotopes
No
    Isotope van
No

Will hazardous material be used aboard, or deployed by an ROV? No

What measures or plans have been made a) in the event of a spill, and b) for the removal and/or disposal of these materials at the completion of the cruise?