Energy giant Inpex is ramping up preparations to dredge a shipping channel in Darwin Harbour.
The channel will allow large LNG tankers to travel through the harbour to Blaydin Point, where a multi-billion dollar plant is being built to process gas piped from the Ichthys field in the Timor Sea.
From this week, divers, survey boats and barges will begin working in the channel area.
Inpex says it is surveying to get an accurate picture of the harbour floor before dredging begins.
There will be an increase in harbour traffic and Inpex is asking those using the harbour to take notice of new signs and activity.