Haas boss Guenther Steiner has revealed the team suffered a GPS failure during a crucial point of the British Grand Prix which left it unable to communicate with either driver.
Esteban Gutierrez finished 16th at Silverstone, with Romain Grosjean retiring after just 17 laps. It was around the time of Grosjean's retirement that Haas' power problems started, which left the team in a "panic" on the pit wall.
For the midfield runners the switch to intermediates and then slick tyres were crucial in determining the running order but Haas' pit wall problems meant Gutierrez did not come in at the ideal moment for his second stop.
When put to him it wasn't the race Haas was hoping for, Steiner replied: "That's an understatement! Absolutely not. There are a few things which happened that put us in this position. It was a no-no day for us, today, starting from when we went to wet to intermediates -- we double stinted and we shouldn't have done.
"Then we had a problem with our electricity -- everything went down, we had no data, nothing available to the engineers because everything went down. The panic comes in then, you cannot concentrate on the car anymore but you try to fix to get your telemetry back.
"We lost a bit of time there because Esteban then came in a lap late for going to dry [tyres], because it was [during] that period. We couldn't speak properly, we had no GPS, we didn't know where he was and the call came late. We then had a transmission failure for Grosjean."
Steiner is confident the team understands how to avoid similar failures in future.
"It was just an electricity problem, maybe we need to do it a bit different. It's one of those things that we don't know why it happens. I'm not an electrician but I don't think it had anything to do with the wet. It just happened. It was a bad day anyway, we'll fix it and not think about it anymore as I think the electricians found the root cause of it."
Steiner, who said the problem occurred for "six to ten" laps, thinks this is a natural part of growing for F1's newest addition to the grid.
"These days, we knew they would happen. It's never nice when they happen but you learn out of mistakes, you can do a lot by experience but some things you need to learn and make better. It was a tough race for a lot of people."