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Jarod writes:
Newps wrote: Mxsmanic wrote: Newps writes: You can only be in one airspace at a time. At TTD notice the class D circle isn't a full cirlce. It gets cut off where the class C goes to the ground. Yeah, but look at the altitudes. The top of the Class D appears to be _above_ the floor of the Class C that it overlaps. The class C does not exist where the class D does. Are you sure about that? Providence Class C protrudes into Quonset Point class D airspace and the Quonset Tower is very adamant that the overlapping area is Class C and requires communication with Providence. I'm looking at the inset on the Seattle sectional right now. The dotted line of the TTD Class D doesn't extend into the central part of the PDX Class C (where the latter starts at the surface). However, in the two Class C sectors outside that, you see the dotted line of the Class D, and 25 in a box, indicating that the Class D extends up to 2500 feet inclusive. But those two Class C sectors start at 1700 and 2000 feet, both below the ceiling of the Class D. So is 2000 feet Class C, or Class D? -- Transpose mxsmanic and gmail to reach me by e-mail. |
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![]() "Mxsmanic" wrote in message ... Jarod writes: Newps wrote: Mxsmanic wrote: Newps writes: You can only be in one airspace at a time. At TTD notice the class D circle isn't a full cirlce. It gets cut off where the class C goes to the ground. Yeah, but look at the altitudes. The top of the Class D appears to be _above_ the floor of the Class C that it overlaps. The class C does not exist where the class D does. Are you sure about that? Providence Class C protrudes into Quonset Point class D airspace and the Quonset Tower is very adamant that the overlapping area is Class C and requires communication with Providence. I'm looking at the inset on the Seattle sectional right now. The dotted line of the TTD Class D doesn't extend into the central part of the PDX Class C (where the latter starts at the surface). However, in the two Class C sectors outside that, you see the dotted line of the Class D, and 25 in a box, indicating that the Class D extends up to 2500 feet inclusive. But those two Class C sectors start at 1700 and 2000 feet, both below the ceiling of the Class D. So is 2000 feet Class C, or Class D? -- Transpose mxsmanic and gmail to reach me by e-mail. Should be just like a Class B that has shelves over a Class D, i.e. SEA Class B over Boeing Field (BFI), Class D at BFI goes to 2500, but the Class B starts at 1100, 1800, 2000, and 3000 over various parts of BFI's Class D... In your example/situation from 2000', or where ever the Class C shelf starts, should be Class C. Speculating why they don't put the different Class D ceilings for the different "sectors" might be because then the chart would be more cluttered and more difficult to read, especially while flying. Class C is more "restrictive" than Class D, and thus "overrides" the Class D. You will typically find more IFR traffic and larger planes in Class C than you will in Class D, and typically just plain more traffic in Class C. I believe the person that said "Class C does not exist where the class D does" was only refering to the surface airspaces. |
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