The Barny Sentinel trawl-resistant ADCP bottom mount: design,testing, and application
Perkins, H.
de Strobel, F.
Gualdesi, L.
Stennis Space Center, MS;
This paper appears in: Oceanic Engineering, IEEE Journal of
Publication Date: Oct 2000
Volume: 25,
Issue: 4
On page(s): 430-436
ISSN: 0364-9059
References Cited: 3
CODEN: IJOEDY
INSPEC Accession Number: 6829082
Digital Object Identifier: 10.1109/48.895350
Posted online: 2002-08-06 23:31:36.0
Abstract
A trawl-resistant bottom mount (TRBM) has been developed to meet
the needs of long-term deployment of Acoustic Doppler Current Profilers
(ADCPs) and Wave-Tide Gauges in water depths up to 300 m. This paper
describes the unit's construction and operation together with practical
lessons learned during development, testing, and use that can be applied
to comparable platforms. The Barny Sentinel is derived from a larger
version developed several years ago at SACLANT Center, now extensively
redesigned to incorporate an RDI Sentinel ADCP and a Sea-Bird Wave-Tide
Gauge. A concrete ring surrounding the fiberglass instrument housing
serves as ballast and impact protection. Two independent recovery modes
may be activated by acoustic commands, one of which can operate whether
or not the platform is upright. Features have also been included to
facilitate recovery by remotely operated underwater vehicle. A sending
unit, temporarily attached during launch, provides real time information
on platform depth and tilt, and confirms that the platform is properly
positioned on the bottom before a launch commitment is made. A series of
tests and applications have validated all basic functions and trawl
resistance. Platform cost has been kept below that of the on-board
instruments, while still maintaining the required high level of
recoverability
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