George Scherman:
I just got a drysuit (trilam) and I'm wondering what the norm is for ankle weights. I'm thinking of making my own. Thanks
To my way of thinking ankle weights are something you should see as a temporary measure while you get used to your drysuit. Sort of like training-wheels. When you first start diving in a drysuit it screws up your trim so I don't see the problem with using ankle weights for a while while you play with your trim and get it nailed.
Eventually you'll want to lose them because (a) they really do put more strain than is necessary on your legs and (b) most ankle weights are much too heavy and actually start to drag your feet down too much once you get the technique down.
Here are some suggestions for things to work on:
- First of all, if you are using integrated weights, put some of it back on a weightbelt and start wearing a weightbelt again. The weightbelt forms a restriction that slows down the movement of air inside the suit and makes the suit more stable.
- With a trilam suit pull any extra material up *over* the weightbelt. This will move the biggest part of the bubble above the level of the weightbelt which will help in keeping your feet down.
- Buy a separate cam-band (tank band) and put 2-3 lbs of weight on it. Hang this on your tank below the level of your weightbelt. This will push your hips down which will keep your feet down. Move this weight up and down to adjust trim. Note: you
*must* use a cam band for this. If you try to use something else, like a weightbelt, then your trim weight will fall off.
- Learn to keep your knees bent. With straight legs, your feet are further from the "fulcrum" of trim and the will create more upwards force than they will if they are bent. In other words, keeping your knees bent is one of the keys to keeping your feet down. Learn/feel what happens when you bend your knees. Just by bending and straightening your legs you can get a seesaw (teeter-totter) effect going.
- Learn to arch your back. That's holling your back with the chest out. When you do that, it forces your hips to go down and your feet will follow. This technique is also key to controlling your trim in a drysuit.
That sort of covers the basics. Most of the rest is a matter of practice and getting comfortable with your new bit of gear. Practice in shallow water. You'll find that it takes 10 dives or so before it starts to really fall into place.
R..