The SDT Sherlog TA (Type Approved) is primarily used for hatch cover tightness testing with an internal sensor, an external flexible sensor and a powerful ultrasonic transmitter (multisetting). As requested by the IACS Unified Requirement Z.17, the SDT Sherlog TA has been formally type approved by classification societies. These include the all-important LRS, ABS, DNV, RMRS and HRS. Currently the ...