Things that blip; specifically, devices or systems that make blipping sounds or produce blips on radar.
From 'blip' plus agent suffix '-er' (something that blips), then pluralized with '-s.' This is a technical term from radar and electronics fields.
Most people have never heard 'blippers,' but during WWII, radar operators would have recognized it immediately—it's a perfect example of how technical jargon forms naturally by adding productive suffixes to onomatopoetic words.
Complete word intelligence in one call. Free tier — 50 lookups/day.