Editor's Note: We can't tell if the author who wrote this one was all wet or not. It doesn't seem like he has too much experience, so maybe not!
How to Make a Simple SubmarineDo you have a desire to visit the bottom of a pond or shallow lake, but don't want to spend a whole lot building an expensive sub? Then you're at the right place! The end result is you are still submerged and wet, but your head is dry and you can breathe.
1. Find a basin. Something around fifteen gallons will do. Any sort of large bucket or basin.
2. Practice in a pool. In a pool that you can stand in, put the basin over your head upside down, and lower yourself so that the top edges of the basin (which will actually be on the bottom since it's upside down) are just a few inches below the surface.
3. Walk around. You won't be able to go deep because the air inside the basin will pull it toward the surface. Don't stay under for TOO long of a time, as you will use up your air.
4. Attach weights. Fasten something heavy on all four to edges of the basin. (If your basin is round, then just put four weights equally spaced). These are so that you can go deep and take air with you.
5. How heavy to make the weights. You want to all four weights to be of equal weight, so that the basin is balanced in the water upside down. Fill the basin with water and weigh the water. The TOTAL weight you add to the rims of the basin should be about three pounds more than the weight of the water.
6. Get in the water. Put the basin over your head and you can slowly walk to the bottom of a pond or lake.
* If you are in a pond or lake or some other natural body of water, as soon as you go more than 2 feet down, you can't really see anything. If you are at the bottom of a pond, it will be pitch black. Attach a waterproof flashlight to the basin so that the shining part is BELOW the surface. If the flashlight is above the surface, the glare will prevent you from seeing anything. If you don't have a waterproof flashlight, put one inside two plastic Ziploc bags. (Use two in case one starts to leak.)
* You can put a camera inside two Ziploc bags to take pictures. Just make sure that the camera is submerged when you take the picture, or else it probably won't turn out too good.
* Try not to go too deep too fast! The pressure will hurt your ears. Go down gradually, so that your body can adapt to the pressure change.
* Don't stay under for too long! If you use up all the oxygen in the air, you can pass out. If you are at the bottom of a pond or shallow lake, this would be bad!
* Don't just walk to the bottom of a pond or lake, you can get stuck in the muck! Also, who knows what kind of creatures are down there!
* Don't go too deep! If the pressure is hurting your head or ears, don't go any deeper.
* Do not go any deeper than about thirty feet. Also, go down to depths gradually, so your body can adapt to the increase in pressure. Likewise, come up gradually, so you don't get the bends. As soon as you can feel your air starting to go stale, start coming up immediately, as it will take time to come up gradually.
Things You'll Need
* Large basin
* Pond or shallow lake to explore
Article added: 13 October 2008
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