20 Jun Ripping the bottom out of the rip
The Sea Heaves to the smothered rumble of a heavy detonation as half a tonne of explosives is fired to deepen the Rip channel between Fort Nepean and Point Lonsdale. Below a suction dredger working inside the heads of Port Phillip Bay removing silt. Insert left Mr J.P. Larkin marine surveyor using a sextant to determine a position for dropping explosives. Since 1903, the main shipping channel has been deepened from 30 to 45 feet. Through the heads 16 million tonnes of shipping pass yearly. These pictures were taken yesterday by a staff photographer.
extract from the Herald 20/06/1939