Our strategy for Angry Birds Space Pig Dipper level 6-3 is to fire the Blue bird south through the water. The goal here is to break the icy bottom of the boat on the east side. With a little luck, a one-bird clear is possible. The score in the video below is 53,870.
If you have a different strategy feel free to leave a comment below; however, don't just post your score via the comments, as that's what the leaderboards are for.

Excellent strategy just like the video. Three starred with 54560
55680 – same as video, except I split before entering the water field. One blue went to the glass on the bottom pigs tower, the other two around to get the boat and the other two pigs. This has been somewhat repeatable once I found the initial trajectory.
I concur, splitting just before entering the water seems to be more consistent.
Thank you, increased my score by 2k.
Thanks, I got 55k. Improved my score by 1k.
I split him just before he hits the water because until I saw the video I didn’t know you could split him afterwards. :)
This one’s easy enough to 3 Star, only thing that bothers me are all those debris points wasted and not awarded, there must be a way to do it differently to score much higher, I guess I’ll come back to this later and figure it out.
First bird over the top of the small planet through the upper point where the gravitational fields intersect. Split at the surface of the water. This will usually take out the bottom of the boat much more violently and about 2/3 of the time can result in a one-bird clear with consistent 54k+ scores. I believe there is a lot of potential for higher scores with this method because I have gotten nearly 20k points on a first bird with a pig and entire tower still intact.
Aimed Blue downward about ten degrees below horizontal and split in line (or just before level with) the edge of the atmosphere on top planet. Top bird into bubble blowing plant, middle into base of lower tower and top bird went round and up under boat. 56150k.
Forgot to say that debris down from boat took out last tower.
This seems to be the best way to get higher scores. Just like @dasa51 describes I aimed my bird slightly downward and split soon after it left slingshot. A few times I had one pig left with potential for 56-57k scores but eventually all of them popped and I got 57200.
Your comment about splitting soon after leaving slingshot helped me get my 56,700 (so.. close to a #1 Highscore, but not there). I tapped to split AS SOON as I released shot. I noticed that many many times the split didn’t happen & don’t know if it is my device. When aiming slightly down I aimed towards the intersection of gravitational fields but made sure the dotted line for follow through path was straight & not up & around. For me, it seemed the immediate release was key to where there split birds landed.
Splitting fast is possible by double tap.
Another way with scores around 55K. I went clockwise over top planet. Set the aura of both planet so bright star are out of the border of big planet but inside smaller one. This is an mark point for trajectory adjust. Fly below that star. Split little before a water. At the moment I’m few hundreds higher with oposite direction.