SIN Uplink Tower

A SIN Uplink Tower is a structure that connects a city, town, or outpost to the Shared Intelligence Network. 
When a player interacts with a SIN Uplink Tower, an area on that player's map lights up, typically in the shape of a circle around the activated Tower. 
Activating major SIN Uplink Towers in a particular area unlocks the achievements Turn on The Lights, Turn on More Lights, and Turn on Even More Lights.
Activating all major SIN Uplink Towers in all three areas unlocks the achievement It's Better to Turn on a Light... Unlocking this achievement awards the player with the Adventurers' Glider Pad. 
SIN Uplink Towers can be found in the following locations:
===Coral Forest===
*Copacabana
*Northern Shores
*Thump Dump
*Cerrado Plains
*Trans-Hub Command
*Nutretic Processing
*Broken Shores
*Biosphere Research Facility
*Sunken Harbor
*Stonewall
*Sigu's Sanctuary
*Shanty Town
Activating all 12 major SIN Uplink Towers in Coral Forest unlocks the achievement Turn on The Lights.
===Sertao===
*Dredge
*Andreev Station
*Forward Operating Base Sagan
*The Nest
*Lab 16
*Tecumseh Airbase
Activating all 6 major SIN Uplink Towers in Sertao unlocks the achievement Turn on More Lights.
There is no SIN Uplink Tower at Orbital Comm Tower. To light up this portion of the map, players must activate the SIN Uplink Tower at Forward Operating Base Sagan.
===Devil's Tusk===
*Forward Operating Base: Harpoon
*Chosen Mining Camp
*Kaimuki Research Station
*Devil's Tusk Sensor Array
*Forest Watch
*Chosen Bulwark
*Crossroads Station
*Chosen Artillery
*Kanaloa Research Station
*Chosen Omnidex
*Chosen Station
*Camp Jasper
*Chosen Prison Watch
*Stronghold
Activating all 12 major SIN Uplink Towers in Devil's Tusk unlocks the achievement Turn on Even More Lights.