Report of a cetacean survey in the Western Approaches of the ...

Proportion of sightings by component of velocityaw ay from the vessel by radial distanceAll dataProportion of sightings by component of velocityaw ay from the vesselAll data0.40.30.20.10-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 10.40.30.20.10-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1Component of velocity away from vessel('-1' directly tow ards; '1' directly aw ay)Component of velocity aw ay from vessel('-1' directly towards; '1' directly away)Fig.12a&b. Proportion of 2005 sightings by component of velocity away from the vessel (i.e. the cosine of the difference between bearing and heading) from the primaryplatform (Fig. a) and the trackers platform (Fig. b) during T+S (fast speed) and survey effort ≤ 3 sea states. Where a value of ‘1’ indicates movement directly away from thesurvey vessel, ‘0’ perpendicular and ‘-1’ directly towards the vessel.Proportion of sightings by component of velocityaway from the vessel>100m radial distanceProportion of sightings by component of velocityaway from the vesselFurthest 25 percentile by radial distance0.40.30.20.10-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 10.50.40.30.20.10-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1Component of velocity away from vessel('-1' directly tow ards; '1' directly aw ay)Component of velocity away from vessel('-1' directly towards; '1' directly away)Fig.13a&b. Proportion of 2005 sightings (> 100m radial distance, Fig. a; Furthest 25 Percentile, Fig. b) by component of velocity away from the vessel (i.e. the cosine of thedifference between bearing and heading) from the primary platform during T+S (fast speed) and survey effort ≤ 3 sea states. Where a value of ‘1’ indicates movementdirectly away from the survey vessel, ‘0’ perpendicular and ‘-1’ directly towards the vessel..0.40.30.20.10Proportion of sightings by component of velocityaway from the vesselRadial distance>1100m-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 10.40.350.30.250.20.150.10.050Proportion of sightings by component of velocityaway from the vesselRadial distance>1500m-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1Component of velocity aw ay from vessel('-1' directly tow ards; '1' directly aw ay)Component of velocity away from vessel('-1' directly tow ards; '1' directly aw ay)Fig.14a&b. Proportion of 2005 sightings (> 1100m radial distance, Fig. a; > 1500m, Fig. b) by component of velocity away from the vessel (i.e. the cosine of the differencebetween bearing and heading) from the trackers platform during T+S (fast speed) and survey effort ≤ 3 sea states. Where a value of ‘1’ indicates movement directly awayfrom the survey vessel, ‘0’ perpendicular and ‘-1’ directly towards the vessel.28