Freight dog,
3nm to the east of Tyabb puts you out over westernport bay!!! All circuits at tyabb are all out to the east but far enough to avoid the township for the downwind leg. The school there teaches the students to use the greenbelts/clearings for crosswind, base legs and the dams to the north and the Steelmill buildings to the south as turning points. These are approx 1.5nm from the strip centreline. Downwind at tyabb presents you with multiple clear paddocks to put the plane down in if a glide approach was not possible. Hardly compares with GAAP's like YSBK and YMMB where the only option is a glide to the airport or land on a factory roof.
JS