Table 2 Number of transits, mean (± standard deviation) speed over ground (SOG), broadband (5–1000 Hz) received level (RL), source level (SL), and sound exposure level (SEL) for the transit-by-transit vessel speed reduction approach from 2014 to 2017.
Group | # of transits | SOG (m s−1) | Source depth (m) | RL (dB re 1 μPa2) | SL (dB re 1 μPa2 @ 1 m) | SEL (dB re 1 μPa2 s) |
|---|---|---|---|---|---|---|
Control | 109 | 7.9 ± 2.0 | 3.8 ± 1.0 | 109.6 ± 5.8 | 194.4 ± 6.5 | 157.1 ± 5.7 |
Rewarded | 43 | 5.4 ± 0.4 | 3.6 ± 0.6 | 101.0 ± 3.7 | 189.2 ± 3.9 | 152.4 ± 3.4 |
