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    id book recommendations?

    Thanks for the recommendations; I finally found a bookstore that carries most of these titles, so I was able to actually browse through the books. The two that I chose to start with are: A Field Guide to Pacific Coast Fishes: North America (Peterson Field Guides), William N. Eschmeyer National...
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    id book recommendations?

    I'm looking for a good book for marine life identification for the southern/central California region. I dive mostly from Santa Barbara and the Channel Islands. Any suggestions? thanks! Cesar
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    Band extender/keeper for Citizen Aqualand Duplex

    Mike, I have Citizen Hyper Aqualand, and I replaced the band with the Waterborne. Not only is it longer, it is also set up in a way that if one of the pins pops out for any reason you will not loose the watch. Cesar
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    Dive computer????

    I'm also considering buying a computer, and I have discarded the D9 as one of my options. Instead, I'm considering the Vytec DS. It is exactly the same as the D9, with two exceptions: no compass, and a larger unit (and screen). So the choice between display size/compass I definitely go for the...
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    Suunto D9: Remaining Air Time and No Deco Time - WHY??

    ScubaMilo is correct in that it lets the diver make decisions. While NDL are based on the computer's algorithm and current depth, air remaining time is affected by other things you can control (besides depth). For example, exertion is one of these factors; if you make it a point to relax and...
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    on the grapevine...

    He seemed to think it was in the same line as the Smart Tec, so I'm assuming UWATEC, but don't know for sure.
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    on the grapevine...

    In a visit this past weekend to one of the local dive shops I was told the Scubapro rep had been there recently, and mentioned they will be releasing a new model to compete more directly with Suunto's D9. It seems like it will also have the capability of trimix... Anyone heard anything about...
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    For those of you computer shopping...

    I've been doing my research in trying to decide on a computer to purchase, and I just ran accross this review that covers several different computers from the safety stand point. It is the first such (recent) review I've encountered... http://www.divernet.com/equipment/0306compsextra.shtml...
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    Top dozen Bumber Snickers...

    "Si hoc legere scis nimium eruditionis habes" If you can read this you're overeducated.
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    Rechargeable Battery Packs?

    I don't have a full answer, but here is a quote from the operating and maintenance instructions of my shockwave II: Note: Some battery formulations can emit hydrogen gas. This gas can create an explosion potential in sealed devices if not vented or removed. Your light is equipped with a...
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    Leisurepro won't sell to me!

    I recently ordered from them, and before doing so I sent email with some questions. I got a reply within 24 hours, and this in great meassure is what pushed me to order from them (and the fact that I paid around $125 vs. $300 if I had purchased locally). Anyway, good luck with your order...
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    The next best thing to diving

    I only got certified this summer, so scuba is a recent addition to my list. Unfortunately I don't have my own equipment yet (getting everything together slowly), so I don't have the full flexibility to just go out on a whim. In general I tend to gravitate to the outdoors. I do a lot of hiking...
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    How do you feel about solo diving?

    There is an article on solo diving in the October issue of Dive Training magazine. I have only skimed through it so far, and it seems to focus not only on all the risks of solo diving, but also outlining what you should consider if you want to do so anyways. Cesar
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    Training... which is worse? What would be better?

    Well... you posted right as I was composing my previous message. I completely agree that the final responsibility for learning lies on the student; this also applies for someone that decides to learn on their own and by seeking more experienced dives that are willing to mentor him along...
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    Training... which is worse? What would be better?

    I go with a combination of both. Since you've already opened a can of worms, I'll just dump them out of it :D I do think they push plastic, and generate a source of income for themselves and the LDSs. Some of the "specialties" they offer are what I would consider a complete waste of time...
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    pressure/volume question

    You are right in that the relationship is linear, but Boyle's Law is not the correct explanation. Boyle's Law is for the same amount of gas (mass is constant). If you look at the full relationship for (ideal) gases, one expression is: Pressure = R * density * Temperature where R is a...
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    No muss, no fuss, no brane - tables for you

    I agree that not teaching the tables would be a bad thing. Learning to use a computer without knowing what is behind it is not a good idea at all (like learning basic math directly on a calculator, without learning to do it by hand). Correct me if I'm wrong, but I get the impression that...
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    Laughing underwater...

    Reading another post brought the following anecdote from my instructor to mind.... He had a student once that did not see the need to learn to clear her mask. She asserted that she would never let water into it. Instead of trying to convince her of this, he just started clowning under water...
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    What happens when

    I guess I over simplified by considering it a single tissue... :rolleyes:
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    What happens when

    As the diver ascends you are correct in that he is offgassing. He is not on-gassing, as it is the opposite process (both can not happen at the same time). When your diver A went to 4atm, the partial pressue of nitrogen increases, so more nitrogen gets dissolved in the tissues. The gradient...
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