repair and maintenance services all relating to apparatus and instruments for use in offshore oil and gas exploration and production; maintenance of underwater acoustic apparatus and instruments and of telemetry apparatus and instruments

computerized sonar systems for marine geological surveys, comprising sub-bottom profliers, transmitters, receivers, amplifiers, swell filters, power supplies and catamaran-shaped flotation containers for use with aforesaid

computer programs relating to geophysical surveying and under water acoustic surveying and mapping; instruments, namely, subbottom profilers, sidescan sonars, and parts thereof, for geophysical surveying and under water acoustic surveying and mapping