A lot of good songs started out as pretty dreadful hackwork broadside ballads - but they got worn down and amended and turned into something better.
So there's no harm in posting a pedestrian (or worse) piece such as you indicate Warriors of the Sea to be. It might even have the effect of bringing to light something better. If you think it'd contaminate the Mudcat - and with some of the stuff that's going down in the longest thread currently on the forum, anything would serve to improve the tone I reckon - maybe you could post a link here.
The theme of lifeboats was a very popular one in hymns of the period too - a browse through Moodie and Sankey might throw up some ideas for a new song, and there are first class tunes there.