No on both. You may begin Climb to appropriate altitudes immediately. Except, there are a few Approaches out there where you may have to continue descending to a Maximum Altitude on the Missed Approach Procedure if you begin the Missed above that altitude. If the Missed Approach Procedure has turns, you may not begin turns before the Missed Approach Point. Point. While DA is commonly referred to as the missed approach point on precision approaches, the Missed Approach Point does have a geographic location. It is the point over the ground where the Glideslope intersects the Decision Altitude. It's geographic location is sometimes not explicitly depicted on the Chart.