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It has two timebases, which allows delayed triggering. | It has two timebases, which allows delayed triggering. | ||
Type 545 was [[introduced in 1955]] along with Type [[541]], and superseded in 1959 by Type 545A, | Type 545 was [[introduced in 1955|introduced February 7th, 1955]] | ||
along with Type [[541]], and superseded in 1959 by Type 545A, | |||
which was in turn superseded in 1964 by Type 545B. | which was in turn superseded in 1964 by Type 545B. | ||
Type 545A improved the control ergonomics significantly but did not embody any major design changes. | Type 545A improved the control ergonomics significantly but did not embody any major design changes. |