Does not compute

Everyone is familiar with GPS, which underlies computer and smartphone mapping and directions. But billions of users are not familiar with the necessity that GPS must be reset every 1,024 weeks, 19.7 years. The first reset was in 1999, the second one was April 6 of this year. Such technical stuff is supposed to be handled by experts, like the city Department of Information Technology and Telecommunications, called DoITT. The feds sent warnings about the possible crash a year in advance.

But DoITT didn’t know and the city’s decade-old wireless network, used by cops and the firefighters, crashed.

The wireless system, NYCWiN, was dead for 10 days because no one hit the reset. Maybe “don’t do it” is more fitting.

The mess was untangled in an outside report the city commissioned. But New Yorkers also deserve more answers from the de Blasio administration.

Luckily, the outage didn’t cause real harm. NYPD license plate readers, many traffic lights and a system tracking EMS vehicles went on the fritz. Nonetheless, the disruption and the city’s failure could leave us vulnerable to cyber attacks.

Why did it take 10 days to get the system back online? How could a slew of civil servants earning six-figure salaries, and Northrop Grumman, the outside contractor earning $37 million a year to manage NYCWiN, have no contingency plans for a outage?

Nobody involved has been fired or disciplined. A week before the report’s release, DoITT boss Samir Saini quit. His handpicked deputy followed him out last week. The city claims that’s unrelated. Sure. Says the report, “during the incident, it was not clear who was in charge.”

Where was Mayor de Blasio? The day the outage began, he was in Nevada, prepping his presidential run.