NFSI Community Update - August 2022

Sep 12, 2022

by Mladen Nedimović , Graeme Cairns

Dear Friends,

A 40 foot container with 30 BOBS and other equipment was shipped to the Pacific Geoscience Centre in Sidney, B.C., for deployment west of Haida Gwaii using J.P. Tully in early October. Twenty new BOBS arrived at the COVE later in August, bringing the total to 62 of the total of 120 purchased. Both the shipping and receiving of BOBS went smoothly. This, however, cannot be said of our Laurentian Fan recovery cruise on R/V Coriolis. While the weather for this short cruise could not have been better, and the ship’s crew was great, the BOBS performed poorly showing mechanical/physical, communication, and software problems resulting in safety concerns, a lost instrument (8 recovered out of 9), and data, which despite what seems to be a good S/N ratio, at this point do not seem useable for research. So, overall, 8 out of 12 deployed instruments were recovered as 3 surfaced prematurely last November. One of these instruments was captured in Azores late this Spring. We are now planning to scale back the deployments offshore BC from 30 to 5 instruments so that we can perform further tests but this depends on what can be resolved in terms of problems we discovered in the short time period left before the start of the Tully cruise at the end of this month.


Mladen and Graeme

Katie with OBS floating
Recovering an OBS