An assessment of some watch schedule variants used in Cdn Patrol Frigates – OP Nanook 2011


  1. Paul, M.A.
  2. Ebisuzaki, D.
  3. McHarg, J.
  4. Hursh, S.R.
  5. Miller, J.C.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
Previous research conducted by DRDC Toronto to evaluate watch schedule variants used on RCN submarines indicated very significant and deleterious effects of the watch system on modeled cognitive effectiveness of RCN submariners. Subsequently, DRDC Toronto hosted an International Submarine Watch Schedule Symposium which led to a new RCN submarine watch schedule which improved modeled performance by about 30%. The RCN surface fleet is aware of this work and supported a request to conduct an evaluation of the surface fleet watch schedule. We evaluated the watch schedules used aboard HMCS St John’s at the end of Op Nanook 2011, over the 8 days that STJ transitioned from the high Arctic to Halifax. The ages of the forty-five sailors who participated in this at-sea trial ranged from 21 to 48 years, with a mean age and standard deviation of 32.9 ± 7.7 years. Ten of these sailors were non-watch-standers, 14 sailors were from the 1-in-2 Port (Front) watch, 14 sailors were from the 1-in-2 Starboard (Back) watch, three sailors were from the 1-in-3 Engineering watch, and four sailors were from the 1-in-4 Engineering watch. All subjects wore wrist activity monitors (actigraphs) to measure their daily sleep patterns quantitatively. The actigraphically-measured sleep and daily work hours were the two data sets that were inputted to the FAST™ (Fatigue Avoidance Scheduling Tool) software to generate modeled cognitive effectiveness for each subject. All subjects maintained a daily activit

Il y a un résumé en français ici.

naval watch schedule;shiftlag;Fatigue;cognitive effectiveness
Report Number
DRDC-TORONTO-TR-2012-078 — Technical Report
Date of publication
01 Oct 2012
Number of Pages
Electronic Document(PDF)

Permanent link

Document 1 of 1

Date modified: