Isthmus
| Joined: | Tue Sep 9th, 2008 |
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| Posts: | 6 |
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Any of Sinn's oil filled watches can do this. The trick is the noncomresability of fluids. If interior volume of the watch can't be compressed, then equal pressure is exerted outward regardless of the depth. Fish and squid work in the same principle. they generally have no collapsible cavities. since they are almost entirely fluid filled, the pressure of the watter has no effect on them. the only thing keeping them from the lowest depth is food, temperature and the ability to fed off predators.
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