The EFL Championship had a military presence on the opening weekend of the football season (Picture: Royal Navy).
Navy Petty Officer Scott Jackson operated as a fourth official for Swansea City's 2-1 victory over Hull City.
The game was being played at Liberty Stadium, which hosts up to 21,088 fans.
PO Jackson is part of the EFL's officiating team for the season as he learns his qualifications to rise up the ranks.
It is yet to be announced which fixture Jackson will be part of this weekend.
Speaking to the Royal Navy website, Jackson said: "When I was notified I could not believe it, I thought it was an U23 appointment.
"To be out on the Championship in itself is something I could only dream of. However, to be out on the first day was fantastic."