Based on many years of study, such methods as visual observation, interior extrapolation method and GPS positioning method used by look-outs for reporting fire are summarized.
通过多年的研究，总结了瞭望员安全报火的方法，即目测法、交叉法、航点法。
Based on many years of study, such methods as visual observation, interior extrapolation method and GPS positioning method used by look-outs for reporting fire are summarized.
通过多年的研究，总结了瞭望员安全报火的方法，即目测法、交叉法、航点法。
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