Other useful websites:
| Aeronautical Systems | www.aeronautical.com |
| Air Crane | www.aircrane.com |
| Aris Helicopters | www.arishelicopters.com |
| Carson Helicopters | www.carsonhelicopters.com |
| Clayton International | www.claytonintl.com |
| Croman | www.croman.net |
| HTS Helicopters | www.htshelicopters.com |
| IMP Group | www.impgroup.com |
