ITP 5 Deployment Operations |
| |
 |
 |
Enlarge Image
Will
Ostrom and Kris Newhall drill the 10-inch diameter hole
through the 3.1 m thick ice floe for ITP 5, while Gary Morgan tends the
chainfall. Photo by Rick Krishfield.
 |
Enlarge Image
The replacement anchor for ITP 5 was recycled
from old mooring chain to replace the original which had been lost during a
previous deployment attempt. Photo by Rick Krishfield.
 |
Enlarge Image
ITP 5 profiler is lowered into the ocean through
the 10 inch diameter hole in the ice by Rick Krishfield. Photo by Gary Morgan.
 |
Enlarge Image
The inductive modem grounding circuit plate is
installed on the tether along with the slip bale just before the surface buoy
is deployed. Photo by Rick Krishfield.
 |
Enlarge Image
Kris Newhall guides the grounding plate and
mooring tether into proper alignment.
Photo by Gary Morgan.
 |
Enlarge Image
Rick Krishfield tests the inductive modem
circuit between the surface buoy and underwater profile while Will Ostrom provides limited cover from the snow
flurries. Photo by Gary Morgan.
|
|
An attempt to
deploy ITP 5 on August 31, 2006 had to be aborted after the anchor was lowered through
a 10 inch diameter hole in a 3.4 m thick ice floe. The anchor wedged under a floe rafted beneath
the first, and eventually the end of the tether wire had to be cut to recover
the rest of the mooring hardware. A
replacement anchor was modified from 250 lb of used mooring chain so that a
week later the system could be deployed on a small 3.1 m thick ice floe in loose
ice conditions. In an afternoon
operation just over 3 hours, an ice floe was surveyed and selected, the gear
transported, ITP 5 installed and inductive modem communications with the
profiler verified while still on the ice.
More information and photos on the deployment
operation are also available here and at: http://www.whoi.edu/beaufortgyre/dispatch2006/dispatch34.html.
Last updated: April 23, 2013 | 
