And he's writing a web diary for CBBC Newsround.
In this instalment, he tells us about the arrival on board of a documentary film crew.
Diary entry 23:
It has been a beautiful day today. Bright, sunny and hot, with a nice breeze.
Yesterday in Iraq I met two guys working for the BBC. They're doing a documentary film.
Today they turned up on the ship unexpectedly.
It was a chance for their first proper shower for a month.
And their first proper meal too.
Food out of a bag
They've been eating army ration packs for the last few weeks, which means everything they have eaten has come out of a bag.
Coming to the ship was a complete break for them, and it was nice for us to see a couple of new faces too.
Otherwise not a lot happened today. I did aerobics again, but this time on the flight deck, as the sun set.
Matt on reporting on ship
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