On arrival on 23 August , it found only two lighters and no tugboats .
To increase the rate of discharge , the Tug and Lighter Company , a unit which had served in the Siege of Tobruk , was sent to Port Moresby .
On arrival on 23 August , Port Moresby found only two lighters and no tugboats .
To increase the rate of discharge , the Tug and Lighter Company , a unit which had served in the Siege of Tobruk , was sent to Port Moresby .