theodolitic method of measurement

participation in management

proprietor <store,hotel> / the management <general term> / manager

operate / conduct / management / keep / operation / manage / run

business performance / business showings

be wary of / be cautious

the danger level / the warning line

open up / cut *one's way through

clear water of obstacles and continue navigating a ship

keeping watch / be on the watch / guarding / keeping a lookout / being on the watch / keep a lookout / guard / lookout / be on the lookout / watch / keep watch / being on the lookout