Simon White has written a series about Captain Jethro Cockerill "Cocky" Penhaligon. They are currently out of print and information is hard to come by, however, some references indicate they are may not be suitable for children as his bedroom activities have equal prominence with his sea career.
AOS Naval Fiction
Series: "Cocky" Penhaligon
The English Captain : 1800: "Cocky" Penhaligon is given command of the 32-gun frigate Avenger by Nelson and tasked to destroy a French 74
Clear for Action : Avenger is ordered to the Western Mediterranean to harass French shipping
His Majesty's Frigate : Penhaligon and Avenger escort a convoy of East Indiamen to Madeira