RV-Investigator-Drop-Keels

[Music plays and plankton appear on screen with text:  Marine National Facility]

[Camera pans over a school of southern bluefin tuna]

[Image changes to show an animation of RV Investigator]

[Text appears: RV Investigator Drop Keels]

[Camera moves to show the keel of the boat. Text appears: Two drop keels can be lowered and raised. They contain a variety of scientific equipment.]

[Camera zooms in on the drop keels. Text appears: The drop keels contain sonar equipment for studying marine life.]

[Camera moves around and continues to show the drop keels with blue light (representing the sonar) beaming from them. Text appears: The centre drop keel contains a sonar system that can send signals at five different frequencies.]

[Image changes to show RV Investigator with images of zooplankton and prawn like species in the water underneath a line marking water depth of 100 metres. Text appears: Beam 1 to 100 m - zooplankton 1-10 mm and species like prawns.]

[Image changes to show RV Investigator with images of zooplankton and jellyfish species in the water underneath a line marking water depth of 200 metres. Text appears: Beam 2 to 200 m - zooplankton larger than 10 mm and species like jellyfish.]

[Image changes to show RV Investigator with images of Blue Grenadier and Snapper in the water underneath a line marking water depth of 500 metres. Text appears: Beam 3 to 500 m - zooplankton larger than 20 mm, and species like Blue Grenadier and Snapper.

[Image changes to show RV Investigator with images of Orange Roughy, Icefish and Lantern fish in the water underneath a line marking water depth of 1,500 metres. Text appears: Beam 4 to 1,500 m - fish species like Orange Roughy, Icefish and Lantern fish.

[Image changes to show RV Investigator with images of Patagonian Toothfish fish in the water underneath a line marking water depth of 3,000 metres. Text appears: Beam 5 to 3000 m - fish species like Patagonian Toothfish.         

[Camera moves back to the keel of the boat. Text appears: The drop keels are fully retractable, so instruments can be maintained and additional equipment can be fitted.

[New text appears: Until now, Australian scientists only had access to fish finding sonars that operated down to 1,500 m. This data will allow scientists to better understand our ocean biology and assist in sustainably managing commercial fisheries like Blue Grenadier, Red Bait, Herring, and Pilchards.

 [CSIRO logo appears with text: Big ideas start here www.csiro.au]