Crew members lined up on the flight deck of destroyer HMS Dauntless to form the word "Mum" and two kisses.
The photo was taken from the ship's helicopter which was on a training flight.
The greeting was sent on behalf of the 210-strong crew of the Portsmouth-based warship, which is in the Gulf to deter piracy and keep sea lanes open.
For many of the service personnel on board the destroyer, it is their first time on a major deployment away from the UK where Mothers Day is celebrated on March 15.
"We are all so grateful for the amazing support we have received from home in the last few months and it is great to be able to send a rather different Mother's Day e-card while we are deployed."
HMS Dauntless left Portsmouth port in January for a five-month routine deployment.