nonprecision

1.An MDA is the lowest permissible height (in a nonprecision approach) at which an aircraft can be controlled by reference only to instrument information.

最低下降高度是在仅参照仪表信息纵航空器时的最低允许高度(在非精密进中)。

2.?最低下降高度是在单独参照飞行仪表续非精密进时的最低允许高度。

(a) MDA is the lowest permissible height at which a nonprecision approach can be continued by reference solely to flight instruments.