This is turning into a great list of sea-music!
Just a few comments/questions to your suggestions:
The Ciurlionis tone poem is also recorded by Marco Polo, and seems to be the easiest to get hold of. Is it a recommended one?
Guy Ropartz - How are those symphonies of his recorded by Timpani? Comparable to Jean Cras?
Gustaf Bengtsson - "Vättern". Glad this work was mentioned, because it was actually that symphonic poem that ended my evening of sea-music yesterday. A bit hyper-romantic at times, but just listen to the wonderful waves in the introduction (and at approx 11 min)! I wonder when/if Sterling will record Bengtssons 2 remaining symphonies?
Gösta Nyströms Sinfonia del mare can be accompanied by his symphonic poem "Ishavet" ("Artic Ocean"). A very cold and dark work, but as is mentioned; accessible. I believe BIS has made a decent recording.
Albion! Thanks for the Ethel Smyth tip! New one for me. That old deleted recording is still available on amazon, if I can afford it..
When it comes to John Alden Carpenter and Hadley: Great music, let's do hope Naxos is planning more recordings of those two composers' music!
Morten