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Author Topic: SP Jetfins sinking legs  (Read 3886 times)

Cle

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Re: SP Jetfins sinking legs
« Reply #10 on: 01 Feb 17, 18:47 »
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  • If you cant find someone you think is qualified enough then I can private message you his contact
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    grandweapon

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    Re: SP Jetfins sinking legs
    « Reply #11 on: 05 Mar 17, 02:23 »
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  • SP Jetfins are quite heavy and negatively buoyant due to the material used. Some other brands of jetfins (UTD, OMS, Deep 6, etc) are closer to neutral or even positively buoyant.

    addroger

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    Re: SP Jetfins sinking legs
    « Reply #12 on: 01 Sep 17, 01:00 »
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  • Hello everyone,

    I have recently purchased a brand new pair of SP Jetfins a few months ago.

    Tried it out on the swimming pool several times and I had no problems in bending my knees upwards parallel to my body maintaining the horizontal trim position.

    However, just 2 days ago while I was out diving with it, I realized that my feet was sinking thus not able to maintain the flat position while my leg upwards.

    I was told that the fins are too heavy and to change to other types of fins. I am reluctant to change therefore are there any ways to counter such problems? Or if anyone is facing the same problem here?

    Will shifting my weights from my weight belt to the tank strap going to improve my trim? Or changing to a positively buoyant booties (if any) help? I only wear rash guard and board shorts for dives. Or will changing to a wetsuit help to counter my sinking feet?

    Thank you very much peeps.

    It might help if you are wearing long wetsuit. The compensation probably is not there when you are in your rash guard. Anyway, after multiple dives, your body heat would be lost. Maybe you do not feel it now or the number of dives does not cause you any discomfort. Seen many dive guides covered themselves from head to toe, when asked they told me this from their experience.

    LongHoseDiverman

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    Re: SP Jetfins sinking legs
    « Reply #13 on: 23 Nov 17, 13:11 »
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  • legs heavy:
    BC or trim device i prefer calling, can be adjusted to sit lower.backplate alu? adjust and lower the harness on the shoulder and compensate/shorten the crotch strap.you could well repositioned the entire trim device lower by up to 4-6cm.
    It's good advise donning full wet suit as well with 5mm bootie or more.adding a weight to tank nearer to top would balance up perhaps.also try to position the tank higher as high as ur head,thus shifting weight balance.check also ur accessories well balanced on both sides.i have experimented bungee the higher bladders so as to direct more air inflation towards the lower end of the BC.it's up to ur discretion to try this if it is last resort without changing out JF.
    the trick is weighting and with counter balance, tuck tightly the hips/glutes and a zero-movement hoover can be rediscovered.
    Feeling weightless and 'floating' in the depths is the correct sensation to begin with, that indicates correct weighting for the best trim dive that will follow with correct posture and finnings.

    #sharing
    « Last Edit: 23 Nov 17, 13:21 by LongHoseDiverman »