- Ampolex;
- Apache China Corporation;
- Apache Energy Ltd.;
- ARCO;
- ASP Ship Management;
- Australian Coastal Shipping;
- Australian National Line;
- Banner Industries;
- BHP Petroleum;
- BHP Transport;
- Brambles Shipping;
- Bridge Oil;
- Brunei Shell Petroleum;
- Cairn Energy (India) Ltd.;
- Caltex;
- Carigali-Triton Operating Co.;
- Coastal Expressline;
- Command Petroleum;
- CSBP Farmers;
- Cultus Petroleum;
- ESSO Australia;
- ESSO Malaysia;
- Exxon USA;
- Frankipile Pty. Ltd.;
- Hadson;
- Homes West;
- International Marina Consultants;
| - International Petroleum Co.;
- Kerr McGee;
- Lend Lease;
- Methanex;
- Marathon;
- Maxus Indonesia;
- Mobil;
- NZ Refining Co.;
- Petrocorp;
- PNG Department of Mining and Petroleum;
- ROC Oil;
- Santa Fe;
- Santos;
- Scott Wilson Irwin Johnston;
- Shell;
- Shell Todd;
- Skilled Maritime Services;
- State Gas Pipeline Unit - Queensland;
- Teekay Shipping (Canada);
- TT Line;
- Total Indonesia;
- Unocal Thailand;
- US Navy;
- Vietsopetro;
- WAPET; and
- Woodside.
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