Question: In [Triangle](http://www.imdb.com/title/tt1187064/), at the start when Jess arrives at the boat for the "first" time, is this the start of the continuation of the ending scene?

It's known that the cruise ship and any surroundings after leaving it is in a time loop.

Though Jess remembers the ship and tells Greg, she makes no indication that she is in the time loop. So yes, the movie was meant to confuse the user. But seeing that, according to the number of dead Sallys on board, the time loop occurs more than 20 times.

So, the first time she entered the loop, the storm sent her into an alternate reality with the never-ending time loop? Is this what the movie was showing? I noticed there is a deadly Jess that was not really in the foreground that got shot in the head, and stabs Sally and Downey in one of the rooms. I cannot really place where she falls into the picture seeing that one of the previous Jess instances killed that Jess instead of letting her jump overboard.

So is there a separate timeline/reality?

Answer: 
The only thing possible to break out from the same-things-happening time loop is the "knowledge" of the previous loop, so that she can change them. I think she loses it all while she falls asleep on the boat, waking up with champagne and all.

All time bending movies have their inconsistencies somewhere. They're good for entertainment purpose only, and Triangle is one of my favorites.
in order to understand i think first you need to consider that the movie has a linear story. The most important thing in this movie that you must consider in order to solve most of the puzzle is that when she arrives for the 2nd time she is not like the 1st jess and she already knows everything that is going to happen till the point that she is pushed into the sea (2nd jess is the one that already has seen the taxi driver and decided to come again to change things) in other words after jess 1 points a gun at jess 2 (the one that is aware) jess 2 runs away and starts shooting at theater and get hit by jess 1 and becomes that bloody face jess at the end and the bloody face jess is the longest jess that ever exists in this linear timeline but unfortunately she gets killed by the next 2nd jess and will never be able to use her foresight in order to change things and the loop starts.