Collector/Helzel - A binary radar is what people seem to refer to 2-digit radars as (e.g. 7557557, 0202020, 6664666). Personally, I feel that in the true meaning of "binary", it should refer to notes that only consist of 0s and 1s (e.g. 1101011).
A ladder radar has digits that go up/down or down/up (e.g. 1234321, 5678765, 9876789).
A ladder radar has digits that go up/down or down/up (e.g. 1234321, 5678765, 9876789).



















