When I read through boblipton's review, I noticed that he felt that this short was made up of totally random gags and they looked like they made it up as they went. I would pretty much agree...and would also add that the film is far more slapsticky than you'd expect from a Hal Roach production. When I say 'slapsticky', I am referring to the style of silent comedy generally from before 1920. Up until then, instead of clever gags, most comedy shorts (particularly those of Mack Sennett) had a lot of random punching, kicking and firing of guns...with no comedic sense or timing...just random violence that was considering funny...but generally wasn't. In "All as Sea", there's just a lot of folks kicking each other in the butt for no reason...and it's never funny...and is unusual for Hal Roach films.
In this Snub Pollard comedy directed by Charley Chase, Snub is on the beach and the gags come one after the other but have little coherence. Several gags involved a cop thinking Snub was a perv....and his response was to kick Snub and chase him about the beach...not exactly inspired stuff. But what happens next...well...that IS random. Although the film was made in 1919 and seemed to be set in the present day, pirates appear and kidnap a group of bathing beauties. The pirates were all dressed pretty much like 18th century pirates! And, Snub dresses up like a sailor and gets a group of sailors to help give chase....and they all climb aboard a mini-sub and pursue the fiends. Again, this is all very random. Some of the randomness and the pirates might be explained by the ending...but still, not well.
Overall, there are a few laughs but this is clearly NOT one of Roach's better shorts of the era.