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CLAIRE.CARDY@NORTEKGROUP.COM
www.nortekgroup.com
Pushing the limits with ADCPs:How to get more out of your instrumentation.
Introducing our Signature100
Medium range ADCP (100kHz, ~400m range)
Multi-frequency echosounder (70-120kHz)
1500m rated
Observe physical-biological interactions
Identify complex physical processes
NEW: Vessel mountable with bottom track
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Internal Waves
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Internal Waves
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Impact on Subsea Operations
M. H. Alford et al., Nature 521, 65, 2015
Large scale, long period oscillations
South China Sea, waves visible from space
Can cause strong current flow conditions subsea
Potential damage to subsea infrastructure including
O&G pipelines and floating platforms
Extreme Value Analysis and design criteria
Bole, 1994
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Improved ability to accurately
measure near bed conditions
Roughness length – distance
from bed where flow
stagnates
Knowing this value is
important to subsea design
criteria
Near bed station keeping
Pipe/cable laying
Pipe/cable survey
Foundation design
Sammartino et al. 2018 - V Encuentro de Oceanografía
Física 2018 (EOF) Vigo (Spain), 20-22th June 2018
Boundary Layers
Design criteria - shear
A large proportion of subsea
operations occur near/in the
boundary layer
Near bed station keeping
Pipe/cable laying
Pipe/cable survey
Foundation design
Rock dumping
Scour analysis
Image courtesy of SeatoolsBV
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Impact on Subsea Operations
Biomass
estimates
Biological
behaviours
Marine species
mapping or
tracking
Consenting &
EIA
Fewer sensors
= cost savings!
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Physical-Biological Interaction
(Sub) surface buoys
Long term studies
High resolution
Vessel-mountable option
Real time data
Provides operational information
Multi-parameter = multi-purpose
Same device can be used for pre-
operation survey and ROV/vessel
support during operation
Deployment Flexibility
Signature 100: A modern medium range ADCP
equipped with multi-frequency echosounder
Ability to observe oceanographic processes
Internal waves
Boundary layer dynamics
Physical-Biological interactions
Important for safe design and operations
2 in 1 sensor – fewer sensors, lower overall cost
Flexibility in deployment
claire.cardy@nortekgroup.com
Summary
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Summary
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