Surveillance is one of the best data gathering methods that is being employed by private detectives or private investigators. This is due to the fact that this would give private investigators and private detectives the advantage of getting to know how a person would act in a normal state. Surveillance however entails a lot of risk and danger, the risk of being discovered is considered to be the main danger that should be prevented. Data gathering during surveillance not only include surveillance during the day but also during the night where danger may lurk from anywhere. The cover of the darkness may disable private investigators and private detectives from gathering data efficiently. That is why many of those who are considered to be rookies in the field of investigation and in the field of surveillance are making mistakes and getting too close to the subject which leads to discovery and compromises their investigation and even their lives.
Through the benefits of modern technology the darkness being a factor in not gathering data efficiently is now eliminated. This is because of the development of night vision scopes or goggles. One of the latest in the area of night vision scopes is the Ranger 3 Waterproof first Generation Night Vision. This night vision scope is equipped with rubber-armoured housing which gives the user a slip-free convenience in holding. It has three times magnification allowing the private investigator and private detective using it to perform nighttime surveillance at a distance of two hundred to four hundred meters. One of the most admirable features of this night vision scope is that it is equipped with aircraft-grade aluminum gasket, which unlike scopes using plastic gasket prevent the lenses from gathering water and dust. The Ranger 3 is the best companion for a private investigator or a private detective during nighttime surveillance.