A Vessel Simulation and Tug Handling Study. The main objectives of the study was to determine:

  • To ensure that the design provides port availability for safe ship entry and manoeuvring for an average of at least 98% per annum.
  • To ensure that the tug provision (number, power and type) is suitable to support the requirements of the port. The selection of tug provision will be made in conjunction with the input and approval of the Oakajee Port operator which will be Geraldton Port Authority.
  • To establish the vessel under keel clearance (UKC) in the channel and manoeuvring area during manoeuvres so that the probability of seabed bank-touch in the vessel manoeuvring swept path shall be sufficiently low.
  • To ensure that the aids to navigation in the channel and manoeuvring areas are suitable to allow the safe handling of ships.
  • To consider emergency vessel manoeuvring scenarios (including failure of vessel or tug capability), their consequences and management.

In addition to the vessels and area database developed for the study a detailed met-ocean condition was established including:

  • 3D tidal model was implemented at 0%, 10%, 30%, 50%, 70%, and 90% water column levels.
  • wind wave model of direction and height was developed on a 10m grid of the 90 percentile conditions for the predominate wind conditions.
  • wave swell model of direction, period and height was developed on a 10m grid for the 90 percentile conditions.

Dredging International

Provide pre-deployment VoC and vessel handling training to masters and mates prior to the commencement of dredging works at Onslow WA. Training was provided for the following vessels:

  • Twin screw tugs hipped to barges
  • Work boats supporting dredging activities
  • ASD split hopper barges


Provide training to future barge pilots at WAPET Landing, Barrow Island for tug and barge arrivals and departures including:

  • Introduction to pilotage
  • Manoeuvring of barges in confined waters
  • Communications with tug masters
  • Emergency procedures