According to Bloomberg, the queue is the biggest in more than two years as exports slowed for a second week.
The Hunter Valley Coal Chain Logistics Team is targeting 98.3 million tonnes per annum loaded in December.
Last week, from December 14-20, ships waited an average of 13 days offshore before being loaded.
As of last week, loading was at a rate of 103.4Mtpa, 317,000t above the minimum throughput estimate. Port stocks decreased to 1.185Mt.