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    Nothing is easy?
    From: Lu Abel
    Date: 2015 Oct 20, 11:47 -0700

    While a bit off-topic from celestial navigation, a very traditional
    method of coastal navigation is taking bearings on shore-side objects.
    Lighthouses are perfect -- they're tall, they're on the shore and not
    way back, and they're illuminated at night so you can get a good bearing
    24 hours a day (except for foggy days).   In fact, one of the
    descriptions of the stars is "lighthouses in the sky."   And in some
    strong sense, a star sight is a vertical angle on a *very* tall object.
    The Spratley Islands are in the South China Sea about equidistant from
    Vietnam, the Philippines, and Malaysia, but also near southeastern
    China.   There are a few natural islands in the chain, but also lots and
    lots of shallow spots.   Shallow enough that landfill can be dumped to
    create an island!   China has been doing this.   Speculation is that
    there is potentially oil in the region and China wants to literally
    create Chinese territory where there was none before.
    China has even erected some lighthouses in the disputed territory.
    And now the rub -- if a vessel uses one of these lighthouses for
    navigation (eg, taking and logging a bearing on it) is the vessel -- and
    by implication, its flag state -- recognizing China's territorial claims??
    Time to dust off the old GPS!
    Here's an article on the matter:

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