Are we talking about setting a brush fire to signal searchers or lighting a small, contained fire or perhaps 3 as I believe that's the preferred method of signaling for help?
Anyone who purposely sets a brush fire is an arsonist, someone who lights a controlled fire(s) to attract the attention of rescuers is a member of these forums...;^)
John E
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JohnE
"and all the lousy little poets
comin round
tryin' to sound like Charlie Manson"
The Future/Leonard Cohen