Russian plane Radio Direction Finder mistake.
I send this bug to Oleg too 8 years ago, he corrected it.
Testimony from Chinese version Yak-18 manual.
Historical Yak-18 Radio Direction indicators finger NOT indicate Beacon direction.
http://bbs.dof.cn/uploads/monthly_06...1371804924.jpg
http://bbs.dof.cn/uploads/monthly_06...1371804988.jpg
http://bbs.dof.cn/uploads/monthly_06...1371804999.jpg
http://bbs.dof.cn/uploads/monthly_06...1371805011.jpg
http://bbs.dof.cn/uploads/monthly_06...1371805026.jpg
定向: Direction measure
定位: Distance measure
Another, I hope Radio Direction can include 2 mode: Direction measure & Distance measure.
We can found in Yak-18, when Radio Direction working in Distance measure mode, it can display how far away from plane to Beacon.