That's what you did. But your heading won't match the number at the top of the periscope view because, like Gizzmoe said, your heading will be reported in compass degrees and the numbers atop the periscope are relative bearing to the front of your boat; they're two different things.
When you press =, your boat will move to the direction that your persicope is facing, but the numbers on the periscope are not compass bearings.
(Oops, was composing this message when Gizzmoe already responded. SOrry if there's any repetition.)
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