Mr Baker, 61, was last seen on August 6 in Katherine after leaving his car parked in the town centre and returning to his home address in the Edith Farms Road area.

A social media post by the AFP's National Missing Persons Coordination Centre had a special message for Mr Baker from his family.

"We miss you very much and if you are still out there, please come home."

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According to his profile on the register's website, friends and police all hold concerns for his welfare.

"Paul is an experienced camper, who would often travel to remote parts of Central Australia," his profile reads.

However, Mr Baker did not take any camping equipment of have any trips planned before the time of his disappearance.

Mr Baker's daughter Cindy told the Katherine Times last year that the last phone call she had with him on the day he disappeared sparked concern for his well being.

"His mental health was not good," she said.

She also said she believed he may have travelled interstate to Queensland or Western Australia.

Anyone with information about Mr Baker's whereabouts is urged to call Crime Stoppers on 1800 333 000.

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