The AMOSplan is voluntary mutual aid arrangement where oil company equipment may be shared to best respond to a spill.
[2] AMOSplan replaced the former Marine Oil Spills Action Plan (MOSAP).
[3] The MOSAP was activated when an oil spill became too large for an individual company to adequately deal with.
Integration with government responses to spills is framed within the National Plan to Combat Pollution of the Sea by Oil, which is managed by the Australian Maritime Safety Authority.
[4] In 2009, AMOSC responded to the Montara oil spill in the Timor Sea by mobilising aircraft and dispersant for aerial spraying.