Well, the forced rhyme between "trim" and "beam" in the first verse continued to annoy me but I may have a fix:

C-----------------F-------C
I have sailed in old tea-clippers,
-------------------F--C-----G
Bowlin' o'er the o-cean's gleam;
C--------------------F-------C
Sailed in ships so taut an' trim,
--------------------G--------C
With the wind a-baft the beam;
F--G7---------F------------C
As the risin' gale grows stronger
--------------F----C------------G
Filling out each snow-white sail,
C--------------------------F-------C
"Look sharp, lads, she rolls to leeward,
----------------------G--------C
Now she dips her weather rail."

The tune seems to be stable.

Cheerily,
Charley Noble