Translations for practicable in French

Here are paragraphs from public domain books translated:

"There seems to be only one reasonable course," said Professor Summerlee. "If you have explored the east, we should travel along the base of the cliff to the west, and seek for a practicable point for our ascent."	— Je ne vois qu’un parti rationnel, dit Summerlee : si vous avez exploré l’est, allons vers l’ouest, et cherchons un point praticable.
The Lost World, by Arthur Conan Doyle	Le Monde perdu, de Arthur Conan Doyle