A SUB BOTTOM PROFILER MODULE THAT IS USED FOR SUB SEA PROFILING IN AN AUTONOMOUS UNDERWATER VEHICLE. IT CAN ONLY BE USED WITH OTHER MODULES WHICH ARE ALSO PART OF THE AUV WHICH IS USED DURING SURVEY OPERATIONS IT PRODUCES IMAGES OF SEAFLOOR CONTOURS AND SUB BOTTOM LAYERS BY USING DIGITALLY PRODUCED LINEAR FM ACCOUSTIC TRANSMISSIONS. SOUND ENERGY TRANSMITTED TO THE SEAFLOOR IS REFLECTED OFF THE BOUNDARIES BETWEEN LAYERS OF DIFFERENT ACCOUSTIC IMPEDANCIES.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIR)S GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 9015 - SURVEYING (INCLUDING PHOTOGRAMMETRICAL SURVEYING), HYDROGRAPHIC, OCEANOGRAPHIC, HYDROLOGICAL, METEOROLOGICAL OR GEOPHYSICAL INSTRUMENTS AND APPLIANCES, EXCLUDING COMPASSES; RANGEFINDERS. GIR 6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 901580: OTHER INSTRUMENTS AND APPLIANCES CN CODE 90158019 ELECTRONIC, NOT ELSEWHERE SPECIFIED. ALSO CLASSIFIED IN ACCORDANCE WITH: HSENS, CHAPTER NOTE 9015 (IV)