What’s the difference between the two statements one has a comma and the other has or.

Question

1.provision of aeronautical information shall be in writing or verbal( including via the radio telephone)

2.Aeronautical information is provided by means of written, verbal (including by radio telecommunication)

Answer 1

Sentence #2 is incomplete and needs and "or" instead of a comma.

Answer 2

1. Aeronautical information shall be provided in writing or orally (including radio telephony). 2. Aeronautical information is provided in writing or verbally (including radio telecommunication). Basically, the two revised sentences say the same thing using different words. The 2nd sentence you gave is not a complete thought with a comma between the two words. Your 1st sentence is a complete thought with the insertion of 'or'. It depends upon your preferences regarding the people who will be reading the manual.