1 files changed, 49 insertions, 0 deletions
diff --git a/ADSBDecoderFramework/ADSBTypeCodeAirbonePositon.swift b/ADSBDecoderFramework/ADSBTypeCodeAirbonePositon.swift
new file mode 100644
index 0000000..b6a302a
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+++ b/ADSBDecoderFramework/ADSBTypeCodeAirbonePositon.swift
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+//
+//  ADSBTypeCodeAirbonePositon.swift
+//  ADSBDecoder
+//
+//  Created by Jacky Jack on 27/09/2026.
+//
+
+//DF17 message types codes  8 to 18
+public class ADSBTypeCodeAirbonePositon:CustomStringConvertible {
+    var TypeCode:Int = 11
+    var SurveillanceStatus: Int = 0
+    var SingleAntennaFlag: Int = 0
+    public var Altitude: Int = 0
+    var Time: Int = 0
+    public var CPRFormat: Int = 0
+    public var Latitude: Int = 0
+    public var Longitude: Int = 0
+
+    public init(_ bindata:ArraySlice<UInt8>) {
+        let ss = (bindata[4]>>1)&(0x3)
+        SurveillanceStatus = Int(ss)
+        let saf = bindata[5]&0x1
+        SingleAntennaFlag = Int(saf)
+        let altitude = UInt16(bindata[5])<<4 + (UInt16(bindata[6])>>4)&0xf
+        //print(altitude)
+        Altitude = BarometricAltitudeFeat(altitude)
+        let time = (bindata[6]>>3)&0x1
+        Time = Int(time)
+        let cpr = (bindata[6]>>2)&0x1
+        CPRFormat = Int(cpr)
+        let lat:UInt32 = UInt32(bindata[6]&0x3)<<15 + UInt32(bindata[7])<<7 + UInt32(bindata[8]>>1)
+        Latitude = Int(lat)
+        let lon:UInt32 = UInt32(bindata[8]&0x1)<<16 + UInt32(bindata[9])<<8 + UInt32(bindata[10])
+        Longitude = Int(lon)
+    }
+    
+    public var description: String {
+        var description = "SS \(SurveillanceStatus) SAF \(SingleAntennaFlag) Altitude \(Altitude)ft \n"
+        description += "Time \(Time) CPR \(CPRFormat)"
+        if (CPRFormat == 0) {
+            description += "even"
+        } else {
+            description += "odd"
+        }
+        description += "\n"
+        description += "Lat \(Latitude) Long \(Longitude)"
+        return description
+    }
+}