If you have been swimming regularly then you will be fine on the day.
The floating/treading water, there is no excuse for not getting a 5. My instructor told me off for floating and said If I must float then could I at least look as if I was trying. I asked him what the point was given that the instruction manual says, float, tread or drown proof. He made me tread water... which is not a problem, just irritating considering it is not required. If I was stuck at sea, why would I waste the energy?
Ha! Got him back my final rescue scenario, that'll serve him right for not removing his nipple piercings when I knew I had to get him into our dive boat unaided. HAHAHAHA
The 800m swim I decided to swim in jet fins, seeing as that is what I dive with and I wanted to know what speed I would be capable of. I was very slow and scored a 2.
I then tried my instructors twin jets. If we had the time to redo the test I am confident that I would have scored a 4, unfortunately, tying up the boat/driver/instructor again was not a priority. I was exceptionally fast in the twin jets and swimming was effortless. The jetfins however were exhausting.
The 400m swim.... I swim regularly and consistently swim 2500m within an hour and can now swim 5000m within 2 hours (i intentionally have an inefficient turn to maximise the distance I swim). I am not however a fast swimmer. I have the stamina and endurance but cannot swim fast. I scored a 3, swimming front crawl. Looking at the times I don't think I could possibly have scored a 4 but I know that I am a strong swimmer.
I also don't think male swimmers would have much of a problem with this. Given my personal fitness compared to other male swimmers I lane share with in the pool, men naturally have more strength and power. Something which even with serious gym training, I am not going to develop. I watch unfit males with open fingers and poor inefficient, untidy and splashy technique power ahead of me.
The 100m tow I scored a 4, nearly a 5. Could probably have scored a 5 If I had a gauge of my distance, but all my swimming was in the sea so I had no idea of how far I had left to swim. For this one I suggest you power it as if you're being chased by a White shark. The distance isn't far enough for you to tire, given that you're wearing fins.
I suggest you tow from behind and don;t use the porno push method.
Most importantly don't stress about it, it's not that bad
Nic