Design of the Sydney submersible

"Oberon" at University of Sydney


Images of Oberon: front, side, top, and three-quarter


Oberon's thruster motors are Minnkota Classic 35 electric fishing motors.

The motors have thrust profiles which require a certain amount of current to get them started and cause cavitation before the maximum current is reached.
[Table of forward thrust values]
[Table of reverse thrust values]

On Oberon the motors are run at an average of 12 volts with a maximum current of 10 amperes. The motor itself will take up to 30 amperes. (But remember it is designed to propel a 1500+lb fishing boat.)


The shore power system schematic and circuit diagram.

The submersible power circuit diagram.


Oberon is built on a transputer architecture. Motion control is open loop based on a model of motor thrust.


Oberon carries a sophisticated inertial package and a sonar that provides a map view of the environment.
Oberon carries a Pulnix black & white camera mounted on a Directed Perception pan/tilt device.

By David Wettergreen, <>
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