Hi, Jim! Here's what I found. In Annis' monumental work on sea swords (think 'officer's sword' mostly, as the National Maritime Museum was what he was referencing mostly), he mentions several broadswords with nautical connections. Only two of them from the Greenwich collection were of the Scottish/English baskethilt pattern. They were-
James Robertson-Walker's (entered naval service 1801, died 1858). His was a steel baskethilt broadsword double edged (not a backsword), with flattened bars, heart shapes, hemispherical pommel, fishskin grip. The blade marked with the Passau running wolf and orb/cross marking. The attribution wasn't rock-solid, but better than most.
The second was a doozy! Again, the attribution wasn't definite, but I'm told other works possibily support its nature. It was a baskethilt worn by John Scott, Lord Nelson's Secretary on the
Victory when it sailed at Trafalgar! It was also a steel basket, larger and more ornate than the previous example, with steel bars, heart shapes, cross-shaped designs in the bars, leather-bound grip with wire, conical pommel. This sword bore the Arms of Mechlenberg, marking '165' and an unidentified cutler's proof. Annis goes on to say that this sword is 'meagerly supported' to be Scott's sea sword.
The author goes on to say the obvious. In rare circumstances, these sword types and quite a few others went to sea based on the taste, whims and style of the officers that carried them. Prior to true naval patterning, with no rules came eclectic tastes. Such swords would be 'one-off' affairs, as their general practicality could be questioned (steel baskets rusted easily, their titanic blades made them of limited use on crowded ships, etc). Annis does bring up the important point, however, of troop trnasports. Soldiers (read 'armies!') on board a ship probably carried such. It was just such an epiphany that I had when struggling over the whole 'were Span/Portuguese cuphilt swords really worn by sailors', as depicted in so many movies and books? The answer, surprisingly, was 'yes'. The Treasure Fleets had contingents of soldiers aboard every ship, thus, they wore bilbos and cuthilts. Such an argument could be used to say that any military branch riding aboard a naval transport would have been so armed. Even in the British Navy, post 1790, we see branches of the Royal Marines on the ship for disciplinary purposes, discouragement of mutiny, land raids, etc. That branch of the military carried their own swords, guns, etc.
Finally (!), we must never forget the privateers, merchant class and pirates (
), whose fleets dwarfed even the British fleet. The men of these typle vessels carried just about anything they d#mned well pleased! So, as far as I'm concerned, when it comes to Scottish baskethilts at sea, it's a 'maybe yes or maybe no', but proving that a sword wasn't naval is just as hard as proving that it was!