// adjust heading based on current rudder angle
- if (rudder <= -0.25 or rudder >= 0.25) {
+ if (rudder <= -0.25 || rudder >= 0.25) {
/* turn_radius_ft = 0.088362 * speed * speed
/ tan( fabs(rudder) / SG_RADIANS_TO_DEGREES );
turn_circum_ft = SGD_2PI * turn_radius_ft;