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    Re: Practice Bubble Horizon
    From: Alan S
    Date: 2014 Feb 27, 15:30 -0800


    I have an Astra 111B, which seems like a nice, good quality instrument. Of course, that is the only metal frame sextant I have any experience with.

    As for the Practice Bubble Horizon you mentioned, I bought one of those too. The thing seems tricky to use, though perhaps the problem lies in/with the operator, yours truly.

    The PBH is not illuminated, so it's useable only in daylight, fair enough. One thing I could not figure out is the BC, Bubble Correction Factor, again perhaps my fault.

    Otherwise, I suppose that the thing works, within it's inherent limits, so it might be worth a try. I do believe that you will be satisfied with the 111B, if you buy one.

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