Chapter 4 - Take Down The Rigs | Intel Data Sniper Guide

You'll find the first laptop (1) on the first oil rig, in the quarter-deck painted yellow - near the doors to this structure you can see a blue circle.

The laptop number two (2) is hidden on the second oil rig, a level under the helipad. You'll find it in one of the quarter-decks, just before the cutscene showing a motor boat escaping from the rig.