Canadian Regulation Gliders — Day VFR

605.21 No person shall operate a glider in
day VFR flight unless it is equipped with
(a) an altimeter;
(b) an airspeed indicator;
(c) a magnetic compass or a magnetic
direction indicator; and...

There's a few varios with that capability.

A computer with moving map that shows
magnetic bearing should also satisfy this
reg.

The chance that a Transport Canada
inspector would make a fuss over a
single seater without a compass is close
to zilch, but the guy who signs your
annual needs some coverage.