Figure 8 . Unfiltered calibrated EK80 data from two CRIMAC surveys with RV G. O. Sars in identical colour-scales (left column in figures a, b, c). Figure a (left) shows the original 18 kHz CW (survey 2022115), and figure b and c (left) the new 18 kHz Mk2 in two different situations in survey 2023001116. Noise at 18 kHz was weaker in the 2022115 survey than in 2023001016 survey.
