Marine

At Loggerheads with PAM

November 6, 2017 by Marine Scotland Communications No Comments | Category Fisheries, Marine Directorate general, Marine Directorate Science, Research Vessel Surveys

Duration: 6-13 November 2017

Gear: Sub-surface passive acoustic monitoring (PAM) moorings.

Objectives:

1. To retrieve a previously deployed series of moorings comprising acoustic release systems (eight subsurface acoustic release moorings) and the acoustic recording devices attached to them (eight C-POD and three Loggerhead broadband units). Nine moorings were deployed originally however, one of these (Soay) has already been recovered.
2. To deploy a series of moorings comprising acoustic release systems (six subsurface acoustic release moorings) and the acoustic recording devices attached to them. Each mooring will have a C-POD and a Loggerhead broadband unit attached This west coast background noise and marine mammal monitoring deployment is part of the COMPASS project. Tables 1 and 2 (below) give the locations for recovery of the moorings deployed in August 2017 during survey 1817H as well as the locations for the further deployments to be completed during survey 1917A.

Procedure

Alba na Mara will sail on the morning of 6 November and make for the first mooring position. The ultimate order in which the moorings are deployed will be dictated by the weather forecast and the likely shelter that can be sought along the west coast. Accurate position records will be kept detailing where the moorings are eventually placed as this may differ slightly from the planned position.

Table 1: Location name and position for the moorings to be retrieved during 1917A. The positions listed below were deployed in August during the C-Odyssey charter (1817H).

Table 2: Location name, position and depth for the moorings to be deployed during the Alba na Mara cruise 1917A.

Further Information

• Marine Scotland research vessels and surveys
• Other research vessel survey blogs

Tags: acoustic, mooring, research

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