English ⇄ Russian

field surveillance stresses
gen.	наружное наблюдение (за подозреваемым; You do not want only one individual doing surveillance on your case, as it is easier to get "made" and caught doing field surveillance. Alexander Demidov); наружка (Also, I normally work at night doing field surveillance, so it's hard for me to sleep at night. Alexander Demidov)
hist.	филёры (служба наружного наблюдения Alex_Odeychuk)
jarg.	топтуны (служба наружного наблюдения Alex_Odeychuk)