Balloon/Blimp (Tethered and Radio Controlled)

                                                                                                

                                                                                                   

Advantages:

• Very good, and stable platform for low and medium altitude.
•  Payloads can be moderate in size depending on envelope size and lift capabilities.
•  Safe to use.

Disadvantages:

•  Envelope can be costly, and camera mounts would be similar to those used in kites.
•  Helium can be a costly factor. It is typical of these platforms that the envelope must be deflated for    transport unless a dedicated trailer of appropriate size is used. Helium loss is typically 3% per day, so provision must be provided for topping off of inflation as needed.
•  Positioning must of course be preplanned to insure optimal viewing angles by camera.
•  On tethered platforms there is also the danger of a breakaway, even with modern high tech lines. Provision for automatic deflation is required in most cases by regulations.