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"the [science fiction] writer should be able to convince the reader (and himself) that the wonders he is describing really can come true...and that gets tricky when you take a good, hard look at the world around you."
- Frederik Pohl

Wristband Viewer  
  A device for viewing aerial surveillance images that fits on your wrist.  

Mark Marakson wants to keep an eye (in the sky) on things. He can control aerial surveillance devices, and see what they can see, using his wristband viewer.

The giant mechanical bird deposited Mark Marakson on the hilltop. Mark brushed back the soft green sleeve of his upper garment and pressed several buttons on the wide bracelet he wore upon his left wrist. The bird took flight again, climbing steadily. He controlled its passage with the wristband and saw through its eyes upon the tiny screen in the bracelet's center.


(Wristband viewer from Changeling)

From Changeling, by Roger Zelazny.
Published by Ace in 1980
Additional resources -

Aerial surveillance has been around for at least a century and a half; in science fiction, you can go back to at least the 1928 Ray Cummings novel Beyond the Stars; see the Raytron Apparatus.

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Additional resources:
  More Ideas and Technology from Changeling
  More Ideas and Technology by Roger Zelazny
  Tech news articles related to Changeling
  Tech news articles related to works by Roger Zelazny

Wristband Viewer-related news articles:
  - BAE Spider Robot Wrist Watch Monitor
  - Flexible OLED Wrist Display Like Pip-Boy
  - Army Wrist Display Uses 4.3 Inch OLED
  - The Ultimate Wrist Watch Pip-Boy-style
  - USAF 'BATMAN' Wrist Display
  - Neptune Duo Smartwatch Wearable Wristband
  - FlexEnable OLED Bracelet SmartPhone Concept

Articles related to Surveillance
Adversarial Pattern Shirts Confound Object Detection Systems
A Passing Drone Has Covid-19 Advice
Drones Used To Smuggle Contraband Into Prison
DARPA's Subterranean Challenge

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