Simrad calibrated ES60 vessel mounted vertical acoustic data at 38 kHz during July voyage to quantify the biomass of orange roughy at St Helens Hill and St Patricks Head collected by catcher vessel FV Adriatic Pearl. Other data collected during this voyage was MUFTI-2 deep towed body acoustic data at 18, 38 ,70 and 120 kHz and also Simrad EK60 at 38 kHz from acoustic survey vessel FTV Bluefin.