The night was dark，though sometimes the moving clouds allowed a star or two to be seen in the sky．The poor men held on to any bit of wood they could find．They called to the Marie for help but she was far beyond the reach of the human voice． At one o’clock in the morning suddenly some light were seen in the distance：another ship! The shouts of the
swimmers were heard on board，and willing hands pulled them out of the water．The name of the ship that had so fortunately arrived at the scene in time to save their lives was the Ellen．What had brought
her to the exact spot through the darkness and the pathless sea? Her captain had known nothing of the wreck and had，therefore，attempted to sail away from it. But let him speak for us ．
“just as I was forced by the wind to change course，a small bird flew across the ship once or twice and then flew at my face．I took no notice of this until exactly the same thing happened a second time，which caused me to think it rather unusual．While I wasstudying this，the same bird，for the third time，made its appearance and flew about in the same way as before．
My question is whether "swimmers", "fortunately" "studying" are used correctly here.
Should I use "victims" "....""considering" instead?
As for "fortunately", I just suspect that we could say somebody arrives so fortunately.
But I am not sure about its replacement here.
So can you help me?
Sorry， I can't get your reply clearly.
1. Are "swimmers" and "studying" wrongly used?
2. Is "fortunately" correctly/naturally used here? If not, can you recommend some other word?