He said he was surprised at the intensity of the police response.
"She's served 18 to 20 years for her country."
In 2004, Tapsell was interviewed for a feature about life in the navy.
Then holding the rank of leading sonarman, she was just back from a tour of duty, during which her tasks included disrupting Al Qaeda and Taliban communications, the Waikato Times said.
Tapsell served with Operation Enduring Freedom and also boarded dhows, searching for drugs and weapons. Originally from Tokoroa, she spoke of having a strong, loving, supportive extended family.
Under the Summary Offences Act, a parent or guardian who leaves a child under 14 without "reasonable" supervision and care is punishable by a fine of up to $2000.
Navy spokeswoman Sarah Campbell said Tapsell was still employed by the navy and diversion was likely.
Tapsell is scheduled to reappear in court this month.