A drunken British Royal Marine, who copped a face full of pepper spray after launching himself at a police officer who was arresting his colleague following a night out at Monsoons, has avoided a conviction.

Luis Estuardo McQuade pleaded guilty in the Darwin Local Court on Wednesday to assaulting, resisting and hindering police after the bibulous “moment of madness” in the early hours of August 5.

Prosecutor Brittany Stone told the court McQuade was celebrating the end of his deployment with colleagues at Monsoons when he became intoxicated and was removed by security “as a result of his behaviour”.

After an NT Police senior constable arrested one of his friends, Ms Stone said the 26-year-old ran straight at the officer, put both his arms around his shoulders and neck and tried to pull him back.

“During the struggle with police (a constable) deployed pepper spray into the eyes of the defendant,” Ms Stone said.