Umpiring hockey is a challenging and rewarding experience. To do it well, you need to be fit, you need to be a good ‘people manager’ and you need to be fair and honest. In addition it is important that you have good communication skills, understand the game technically and tactically and, yes, last but not least, you need to know the rules of the game.
If you are serious about umpiring we suggest that you study the online FIH videos - here is a taster:

The ARG player receives a pass and controls the ball. He tries to pass to another team mate but his hit is lifted dangerously at the NZL player.
The umpire awards a free hit to NZL.
The NZL player tries to take a quick free hit using a self pass. He is prevented from doing so by the ARG player.
The umpire stops time and awards a green card to the ARG player who has broken down play.
If you have any questions about umpiring or have a query about the rules or interpretation, please visit the Umpire Forum and post a question.