There are Dolphin Watching Regulations in place throughout Australian waters which include restrictions on approach distances and acceptable behaviour of vessels (including motorised, sail, kayaks and personal craft), swimmers and aircraft (including drones).
These regulations are in place to protect both the dolphins and people from harm.
For an adult dolphin, vessels are not to approach closer than 50m.

Image Sourced from Dept of Environment & Energy
Extra provisions are in place for groups containing calves where vessels are not to approach closer than 150m.

Image sourced from Dept of Environment & Energy
Swimmers are not to approach closer than 30m to a dolphin.
Approach distances for helicopters (including gyrocopters and drones) to dolphins & whales

Image sourced from Dept of Environment & Energy
Approach distances for aircraft to dolphins & whales

Image sourced from Dept of Environment & Energy
Boating and dolphin watching are popular activities along Australia’s coastlines which are also home to resident populations of coastal dolphins species. Many resident dolphins (i.e. individuals that inhabit a specific area throughout the year) encounter numerous vessels frequently on a daily basis. Recreational and commercial vessel activities are one of the main human activities occurring in these regions.
Frequent encounters with vessels can cause significant changes and disruption to the behaviour and acoustic communication of dolphins. Over time, the disturbances can accumulate and have long-term consequences such as reductions in reproductive success and displacement from core habitat areas. These long-term consequences can endanger the population viability of dolphins inhabiting regions of the coastline.
It is important to ensure that any interaction with dolphins is on their terms. If a vessel’s behaviour remains predictable with consistent travel speed and direction and the vessel remains at least 50m from the pod, dolphins then have the choice to approach you and there is less chance of them being disturbed or stressed.
DOWNLOAD the detailed Dolphin Watching Protocol Guide
For more information about the Australian Dolphin & Whale Watching Regulations go to:
http://www.environment.gov.au/