diff --git a/lib/IcaoDecoder.test.ts b/lib/IcaoDecoder.test.ts
index e07a8b8..7efc8ea 100644
--- a/lib/IcaoDecoder.test.ts
+++ b/lib/IcaoDecoder.test.ts
@@ -2,304 +2,173 @@ import { IcaoDecoder } from './IcaoDecoder';
 
 describe('IcaoDecoder', () => {
   it('should set name and icao properties', () => {
-    const decoder = new IcaoDecoder('adf7c8');
+    const decoder = new IcaoDecoder('abc123');
     expect(decoder.name).toBe('icao-decoder-typescript');
-    expect(decoder.icao).toBe('adf7c8');
+    expect(decoder.icao).toBe('abc123');
   });
 
   describe('isMilitary', () => {
-    // Germany mil_1(df) explicit tests
-    it('should match Germany mil_1(df) range 3ea000-3ebfff', () => {
-      expect(new IcaoDecoder('3ea000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('3ebfff').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('3eafff').isMilitary()).toBe(true);
-    });
-    it('should not match just outside Germany mil_1(df) range', () => {
-      expect(new IcaoDecoder('3e9fff').isMilitary()).toBe(false); // just before
-      expect(new IcaoDecoder('3ec000').isMilitary()).toBe(false); // just after
-    });
-    // US military
-    it('should match adf7c8-adf7cf', () => {
-      expect(new IcaoDecoder('adf7c8').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('adf7cf').isMilitary()).toBe(true);
-    });
-    it('should match adf7d0-adf7df', () => {
-      expect(new IcaoDecoder('adf7d0').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('adf7df').isMilitary()).toBe(true);
-    });
-    it('should match adf7e0-adf7ff', () => {
-      expect(new IcaoDecoder('adf7e0').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('adf7ff').isMilitary()).toBe(true);
-    });
-    it('should match adf800-adffff', () => {
-      expect(new IcaoDecoder('adf800').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('adffff').isMilitary()).toBe(true);
-    });
-    it('should match ae0000-afffff', () => {
-      expect(new IcaoDecoder('ae0000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('afffff').isMilitary()).toBe(true);
-    });
-
-    // Egypt
-    it('should match 010070-01008f', () => {
-      expect(new IcaoDecoder('010070').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('01008f').isMilitary()).toBe(true);
-    });
-
-    // Algeria
-    it('should match 0a4000-0a4fff', () => {
-      expect(new IcaoDecoder('0a4000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('0a4fff').isMilitary()).toBe(true);
-    });
-
-    // Italy
-    it('should match 33ff00-33ffff', () => {
-      expect(new IcaoDecoder('33ff00').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('33ffff').isMilitary()).toBe(true);
-    });
-
-    // Spain
-    it('should match 350000-37ffff', () => {
-      expect(new IcaoDecoder('350000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('37ffff').isMilitary()).toBe(true);
-    });
-    it('should not match 349fff', () => {
-      expect(new IcaoDecoder('349fff').isMilitary()).toBe(false);
-    });
-    it('should not match 380000', () => {
-      expect(new IcaoDecoder('380000').isMilitary()).toBe(false);
-    });
-
-    // France
-    it('should match 3a8000-3affff', () => {
-      expect(new IcaoDecoder('3a8000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('3affff').isMilitary()).toBe(true);
-    });
-    it('should match 3b0000-3bffff', () => {
-      expect(new IcaoDecoder('3b0000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('3bffff').isMilitary()).toBe(true);
-    });
-
-    // Germany
-    it('should match 3ea000-3ebfff', () => {
-      expect(new IcaoDecoder('3ea000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('3ebfff').isMilitary()).toBe(true);
-    });
-    it('should match 3f4000-3f7fff', () => {
-      expect(new IcaoDecoder('3f4000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('3f7fff').isMilitary()).toBe(true);
-    });
-    it('should match 3f8000-3fbfff', () => {
-      expect(new IcaoDecoder('3f8000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('3fbfff').isMilitary()).toBe(true);
-    });
-
-    // United Kingdom
-    it('should match 400000-40003f', () => {
-      expect(new IcaoDecoder('400000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('40003f').isMilitary()).toBe(true);
-    });
-    it('should match 43c000-43cfff', () => {
-      expect(new IcaoDecoder('43c000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('43cfff').isMilitary()).toBe(true);
-    });
-
-    // Austria
-    it('should match 444000-447fff except 447ac7', () => {
-      expect(new IcaoDecoder('444000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('447fff').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('447ac7').isMilitary()).toBe(false);
-    });
-
-    // Belgium
-    it('should match 44f000-44ffff', () => {
-      expect(new IcaoDecoder('44f000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('44ffff').isMilitary()).toBe(true);
-    });
-
-    // Bulgaria
-    it('should match 457000-457fff', () => {
-      expect(new IcaoDecoder('457000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('457fff').isMilitary()).toBe(true);
-    });
-
-    // Denmark
-    it('should match 45f400-45f4ff', () => {
-      expect(new IcaoDecoder('45f400').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('45f4ff').isMilitary()).toBe(true);
-    });
-
-    // Greece
-    it('should match 468000-4683ff', () => {
-      expect(new IcaoDecoder('468000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('4683ff').isMilitary()).toBe(true);
-    });
-
-    // Hungary
-    it('should match 473c00-473c0f', () => {
-      expect(new IcaoDecoder('473c00').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('473c0f').isMilitary()).toBe(true);
-    });
-
-    // Norway
-    it('should match 478100-4781ff', () => {
-      expect(new IcaoDecoder('478100').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('4781ff').isMilitary()).toBe(true);
-    });
-
-    // Netherlands
-    it('should match 480000-480fff', () => {
-      expect(new IcaoDecoder('480000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('480fff').isMilitary()).toBe(true);
-    });
-
-    // Poland
-    it('should match 48d800-48d87f', () => {
-      expect(new IcaoDecoder('48d800').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('48d87f').isMilitary()).toBe(true);
-    });
-
-    // Portugal
-    it('should match 497c00-497cff', () => {
-      expect(new IcaoDecoder('497c00').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('497cff').isMilitary()).toBe(true);
-    });
-
-    // Czech Republic
-    it('should match 498420-49842f', () => {
-      expect(new IcaoDecoder('498420').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('49842f').isMilitary()).toBe(true);
-    });
-
-    // Switzerland
-    it('should match 4b7000-4b7fff', () => {
-      expect(new IcaoDecoder('4b7000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('4b7fff').isMilitary()).toBe(true);
-    });
-
-    // Turkey
-    it('should match 4b8200-4b82ff', () => {
-      expect(new IcaoDecoder('4b8200').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('4b82ff').isMilitary()).toBe(true);
-    });
-
-    // Slovenia
-    it('should match 506f00-506fff', () => {
-      expect(new IcaoDecoder('506f00').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('506fff').isMilitary()).toBe(true);
-    });
-
-    // Oman
-    it('should match 70c070-70c07f', () => {
-      expect(new IcaoDecoder('70c070').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('70c07f').isMilitary()).toBe(true);
-    });
-
-    // Saudi Arabia
-    it('should match 710258-71025f', () => {
-      expect(new IcaoDecoder('710258').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('71025f').isMilitary()).toBe(true);
-    });
-    it('should match 710260-71027f', () => {
-      expect(new IcaoDecoder('710260').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('71027f').isMilitary()).toBe(true);
-    });
-    it('should match 710280-71028f', () => {
-      expect(new IcaoDecoder('710280').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('71028f').isMilitary()).toBe(true);
-    });
-    it('should match 710380-71039f', () => {
-      expect(new IcaoDecoder('710380').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('71039f').isMilitary()).toBe(true);
-    });
-
-    // Israel
-    it('should match 738a00-738aff', () => {
-      expect(new IcaoDecoder('738a00').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('738aff').isMilitary()).toBe(true);
-    });
-
-    // Australia
-    it('should match 7c822e-7c822f', () => {
-      expect(new IcaoDecoder('7c822e').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c822f').isMilitary()).toBe(true);
-    });
-    it('should match 7c8230-7c823f', () => {
-      expect(new IcaoDecoder('7c8230').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c823f').isMilitary()).toBe(true);
-    });
-    it('should match 7c8240-7c827f', () => {
-      expect(new IcaoDecoder('7c8240').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c827f').isMilitary()).toBe(true);
-    });
-    it('should match 7c8280-7c82ff', () => {
-      expect(new IcaoDecoder('7c8280').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c82ff').isMilitary()).toBe(true);
-    });
-    it('should match 7c8300-7c83ff', () => {
-      expect(new IcaoDecoder('7c8300').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c83ff').isMilitary()).toBe(true);
-    });
-    it('should match 7c8400-7c87fe and not 7c87ff', () => {
-      expect(new IcaoDecoder('7c8400').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c87fe').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c87ff').isMilitary()).toBe(false);
-    });
-    it('should match 7c8800-7c8ffe and not 7c8fff', () => {
-      expect(new IcaoDecoder('7c8800').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c8ffe').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c8fff').isMilitary()).toBe(false);
-    });
-    it('should match 7c9000-7c9fff', () => {
-      expect(new IcaoDecoder('7c9000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7c9fff').isMilitary()).toBe(true);
-    });
-    it('should match 7ca000-7cbfff', () => {
-      expect(new IcaoDecoder('7ca000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7cbfff').isMilitary()).toBe(true);
-    });
-    it('should not match 7cc409', () => {
-      expect(new IcaoDecoder('7cc409').isMilitary()).toBe(false);
-    });
-    it('should match 7d0000-7dffff', () => {
-      expect(new IcaoDecoder('7d0000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7dffff').isMilitary()).toBe(true);
-    });
-    it('should match 7e0000-7fffff', () => {
-      expect(new IcaoDecoder('7e0000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('7fffff').isMilitary()).toBe(true);
-    });
-
-    // India
-    it('should match 800200-8002ff', () => {
-      expect(new IcaoDecoder('800200').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('8002ff').isMilitary()).toBe(true);
-    });
-
-    // Canada
-    it('should match c20000-c3ffff', () => {
-      expect(new IcaoDecoder('c20000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('c3ffff').isMilitary()).toBe(true);
-    });
-
-    // Brazil
-    it('should match e40000-e41fff', () => {
-      expect(new IcaoDecoder('e40000').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('e41fff').isMilitary()).toBe(true);
-    });
-
-    // Chile
-    it('should match e80600-e806ff', () => {
-      expect(new IcaoDecoder('e80600').isMilitary()).toBe(true);
-      expect(new IcaoDecoder('e806ff').isMilitary()).toBe(true);
-    });
-
-    // Negative cases
-    it('should return false for non-military ICAO', () => {
-      expect(new IcaoDecoder('a00000').isMilitary()).toBe(false);
-      expect(new IcaoDecoder('123456').isMilitary()).toBe(false);
-      expect(new IcaoDecoder('000000').isMilitary()).toBe(false);
-      expect(new IcaoDecoder('ffffff').isMilitary()).toBe(false);
-    });
+        it('should match Egypt', () => {
+          expect(new IcaoDecoder('010070').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('01008f').isMilitary()).toBe(true);
+        });
+
+        it('should match Algeria', () => {
+          expect(new IcaoDecoder('0a4000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('0a4fff').isMilitary()).toBe(true);
+        });
+
+        it('should match Italy', () => {
+          expect(new IcaoDecoder('33ff00').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('33ffff').isMilitary()).toBe(true);
+        });
+
+        it('should match Spain', () => {
+          expect(new IcaoDecoder('350000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('37ffff').isMilitary()).toBe(true);
+        });
+
+        it('should match France', () => {
+          // 1
+          expect(new IcaoDecoder('3aa000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('3affff').isMilitary()).toBe(true);
+          // 2
+          expect(new IcaoDecoder('3b7000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('3bffff').isMilitary()).toBe(true);
+        });
+
+        it('should match Germany', () => {
+          // 1
+          expect(new IcaoDecoder('3ea000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('3ebfff').isMilitary()).toBe(true);
+          // 2
+          expect(new IcaoDecoder('3f4000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('3fbfff').isMilitary()).toBe(true);
+        });
+
+        it('should match UK', () => {
+          // 1
+          expect(new IcaoDecoder('400000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('40003f').isMilitary()).toBe(true);
+          // 2
+          expect(new IcaoDecoder('43c000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('43cfff').isMilitary()).toBe(true);
+        });
+
+        it('should match Austria', () => {
+          expect(new IcaoDecoder('444000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('446fff').isMilitary()).toBe(true);
+        });
+
+        it('should match Belgium', () => {
+          expect(new IcaoDecoder('44f000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('44ffff').isMilitary()).toBe(true);
+        });
+
+        it('should match Bulgaria', () => {
+          expect(new IcaoDecoder('457000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('457fff').isMilitary()).toBe(true);
+        });
+
+        it('should match Denmark', () => {
+          expect(new IcaoDecoder('45f400').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('45f4ff').isMilitary()).toBe(true);
+        });
+
+        it('should match Greece', () => {
+          expect(new IcaoDecoder('468000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('4683ff').isMilitary()).toBe(true);
+        });
+
+        it('should match Hungary', () => {
+          expect(new IcaoDecoder('473c00').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('473c0f').isMilitary()).toBe(true);
+        });
+
+        it('should match Norway', () => {
+          expect(new IcaoDecoder('478100').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('4781ff').isMilitary()).toBe(true);
+        });
+
+        it('should match Netherlands', () => {
+          expect(new IcaoDecoder('480000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('480fff').isMilitary()).toBe(true);
+        });
+
+        it('should match Poland', () => {
+          expect(new IcaoDecoder('48d800').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('48d87f').isMilitary()).toBe(true);
+        });
+
+        it('should match Portugal', () => {
+          expect(new IcaoDecoder('497c00').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('497cff').isMilitary()).toBe(true);
+        });
+
+        it('should match Czech', () => {
+          expect(new IcaoDecoder('498420').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('49842f').isMilitary()).toBe(true);
+        });
+
+        it('should match Switzerland', () => {
+          expect(new IcaoDecoder('4b7000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('4b7fff').isMilitary()).toBe(true);
+        });
+
+        it('should match Turkey', () => {
+          expect(new IcaoDecoder('4b8200').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('4b82ff').isMilitary()).toBe(true);
+        });
+
+        it('should match Oman', () => {
+          expect(new IcaoDecoder('70c070').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('70c07f').isMilitary()).toBe(true);
+        });
+
+        it('should match Saudi Arabia', () => {
+          // 1
+          expect(new IcaoDecoder('710258').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('71028f').isMilitary()).toBe(true);
+          // 2
+          expect(new IcaoDecoder('710380').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('71039f').isMilitary()).toBe(true);
+        });
+
+        it('should match Israel', () => {
+          expect(new IcaoDecoder('738a00').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('738aff').isMilitary()).toBe(true);
+        });
+
+        it('should match Australia', () => {
+          expect(new IcaoDecoder('7cf800').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('7cfaff').isMilitary()).toBe(true);
+        });
+
+        it('should match India', () => {
+          expect(new IcaoDecoder('800200').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('8002ff').isMilitary()).toBe(true);
+        });
+
+        it('should match USA', () => {
+          expect(new IcaoDecoder('adf7c8').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('afffff').isMilitary()).toBe(true);
+        });
+
+        it('should match Canada', () => {
+          expect(new IcaoDecoder('c20000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('c3ffff').isMilitary()).toBe(true);
+        });
+
+        it('should match Brazil', () => {
+          expect(new IcaoDecoder('e40000').isMilitary()).toBe(true);
+          expect(new IcaoDecoder('e41fff').isMilitary()).toBe(true);
+        });
+
+        it('should return false for non-military ICAO', () => {
+          expect(new IcaoDecoder('a00000').isMilitary()).toBe(false);
+          expect(new IcaoDecoder('123456').isMilitary()).toBe(false);
+          expect(new IcaoDecoder('000000').isMilitary()).toBe(false);
+          expect(new IcaoDecoder('ffffff').isMilitary()).toBe(false);
+        });
   });
 });
diff --git a/lib/IcaoDecoder.ts b/lib/IcaoDecoder.ts
index 4521459..13893e4 100644
--- a/lib/IcaoDecoder.ts
+++ b/lib/IcaoDecoder.ts
@@ -8,15 +8,13 @@ export class IcaoDecoder {
     [0x0a4000, 0x0a4fff], // Algeria
     [0x33ff00, 0x33ffff], // Italy
     [0x350000, 0x37ffff], // Spain
-    [0x3a8000, 0x3affff], // France 1
-    [0x3b0000, 0x3bffff], // France 2
-    [0x3ea000, 0x3ebfff], // Germany 4
-    [0x3f4000, 0x3f7fff], // Germany 2
-    [0x3f8000, 0x3fbfff], // Germany 3
+    [0x3aa000, 0x3affff], // France 1
+    [0x3b7000, 0x3bffff], // France 2
+    [0x3ea000, 0x3ebfff], // Germany 1
+    [0x3f4000, 0x3fbfff], // Germany 2
     [0x400000, 0x40003f], // UK 1
     [0x43c000, 0x43cfff], // UK 2
-    [0x444000, 0x447ac6], // Austria (before exception)
-    [0x447ac8, 0x447fff], // Austria (after exception)
+    [0x444000, 0x446fff], // Austria
     [0x44f000, 0x44ffff], // Belgium
     [0x457000, 0x457fff], // Bulgaria
     [0x45f400, 0x45f4ff], // Denmark
@@ -29,29 +27,15 @@ export class IcaoDecoder {
     [0x498420, 0x49842f], // Czech
     [0x4b7000, 0x4b7fff], // Switzerland
     [0x4b8200, 0x4b82ff], // Turkey
-    [0x506f00, 0x506fff], // Slovenia
     [0x70c070, 0x70c07f], // Oman
-    [0x710258, 0x71025f], // Saudi 1
-    [0x710260, 0x71027f], // Saudi 2
-    [0x710280, 0x71028f], // Saudi 3
-    [0x710380, 0x71039f], // Saudi 4
+    [0x710258, 0x71028f], // Saudi 1
+    [0x710380, 0x71039f], // Saudi 2
     [0x738a00, 0x738aff], // Israel
-    [0x7c822e, 0x7c822f], // Australia 1
-    [0x7c8230, 0x7c823f], // Australia 2
-    [0x7c8240, 0x7c827f], // Australia 3
-    [0x7c8280, 0x7c82ff], // Australia 4
-    [0x7c8300, 0x7c83ff], // Australia 5
-    [0x7c8400, 0x7c87ff], // Australia 6 (before exception)
-    [0x7c8800, 0x7c8fff], // Australia 7 (before exception)
-    [0x7c9000, 0x7c9fff], // Australia 8
-    [0x7ca000, 0x7cbfff], // Australia 9
-    [0x7d0000, 0x7dffff], // Australia 11
-    [0x7e0000, 0x7fffff], // Australia 12
+    [0x7cf800, 0x7cfaff], // Australia
     [0x800200, 0x8002ff], // India
-    [0xadf7c8, 0xafffff], // US military (merged)
+    [0xadf7c8, 0xafffff], // USA
     [0xc20000, 0xc3ffff], // Canada
     [0xe40000, 0xe41fff], // Brazil
-    [0xe80600, 0xe806ff], // Chile
   ];
 
   constructor(icao: string) {