Jet fin holes

[Ed Palma]

I recently purchased some jets second hand and noticed the holes in front of the vents- well at least depressions

Detail of the holes:

And before anyone asks: Yes I did do a search for "Scubapro Jet Fin Holes" and got bupkis. Nada. Zip. 12 replies pertaining to other topics than holes.

Scubapro's site was no better.

Anyway, I've got 2 questions:
1) Are the holes supposed to go all the way through?
2) Do they serve a performance purpose or are they just aesthetic?

Thanks in advance for helping out a newbie jets user

 

[Walter]

There are no pics in your post.

On the top of the fin, the holes are between the vent and the fin tip. They come out on the fin bottom inside the vents.

 

[Ed Palma]

Well, thanks for the reply. Not sure about the pics... I can see em just fine, but at least now I know So is it a common thing for those holes to be unperforated? it seems like the mold didn't make the hole go completely through. It wouldn't take much to punch through it myself, but i was just wondering if i really needed to or not.
Thanks!

 

[Nemrod]

As a long time lover/hater of JetFins, and others may think different, the holes, slots and vents are all like tail fins on a Buick. They are just for style and gimmick. I have swam timed laps with the holes and vents taped over and get better times with the taped over fins.

N

 

[Wayward Son]

I think he's talking about the small holes, maybe 3/8 inch diameter, in front of the vents. So far as I can tell they serve no purpose & don't worry about them.

 

[David Wilson]

Here's a picture of Zero Dive's Tech Fins, which feature the same small perforations appearing on Beuchat's original Jet Fins:



Details at Tech Fin : Zerodive, DIVESYSTEM official reseller

 

[Ed Palma]

I think he's talking about the small holes, maybe 3/8 inch diameter, in front of the vents. So far as I can tell they serve no purpose & don't worry about them.

Yep, those are the holes I was talking about. Used a different computer and lo and behold, Walter was right - the pictures do not show up
At any rate, I'm not really worried about the holes - just wanted to see if it was normal to have them slightly blocked up like that. I'm gonna leave mine as is - the way I got them.
Nemrod, I'm curious. Were you referring to the vents or those holes that were taped up? Was the test done via frog-kicking or flutter kicking? Thanks!

 

[Sam Miller III]

The holes are mold indexing points. They do not in any way affect the performance of the fin-opened or closed.

sdm

 

[timle]

Your picture:

 

[b1gcountry]

Yeah, I always thought they were from the molding process.

Tom