Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trips CER200102 to 06 were located around St Patricks Head and St Helens Hill orange roughy fishing grounds. Addition biological data was collected during these voyages (see Marlin record numbers ....). A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).

Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trips CER200102 to 06 were located around St Patricks Head and St Helens Hill orange roughy fishing grounds. Addition biological data was collected during these voyages (see Marlin record numbers ....). A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).

Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trips CER200102 to 06 were located around St Patricks Head and St Helens Hill orange roughy fishing grounds. Addition biological data was collected during these voyages (see Marlin record numbers ....). A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).

Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trips CER200102 to 06 were located around St Patricks Head and St Helens Hill orange roughy fishing grounds. Addition biological data was collected during these voyages (see Marlin record numbers ....). A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).

Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trips CER200102 to 06 were located around St Patricks Head and St Helens Hill orange roughy fishing grounds. Addition biological data was collected during these voyages (see Marlin record numbers ....). A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).

Collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from an industry vessel to provide baseline acoustic data over a month long period during the July roughy spawning event. Trip CER200101 was a tranist only Beechport to Devonport- no fishing. A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).

Opportunistic collection of acoustic data from 28kHz fisheries sounders using Echolistener digitisers from the Megisti Star at the peak of spawning period at St Helens Hill and St Patricks Head to provide extra information over that key time period. A continuation of the 1999 acoustic survey of St Helens Hill where Southern Surveyor and the industry vessel Saxon Progress participated in acoustic surveying of orange roughy stocks (see Marlin record number 5545).