I was going to post a link to the BBC Radio 4 Making Histories programme on naval memoirs and despatches that was on earlier today, but
latin_cat beat me to it, so you can find the link and read her lovely little review here:
BBC Radio 4: Naval Dispatches and Memoirs.
Instead here's a link to a Canadian History Channel programme that's on later this week:
Museum Secrets - The National Maritime Museum. The programme features six artefacts from the museum's collections including a balloon despatched in search of the missing Franklin expedition, an "infernal machine" used during the Crimean war, a pirate sword and, inevitably, Nelson's Trafalgar jacket. There's also a trailer for the episode here:
Click to view