Assertion: diver's system | /r/HasAspect | sufficient range
Facets:
value: to work
type: PURPOSE
Source sentences:
text: The general requirements for an effective system for diver communication are that all the people who will use it have access to the system, that it functions effectively in the specific environment, that the people who wish to use it are familiar enough with it to communicate quickly, accurately and unambiguously with each other, and that the system has sufficient range to work when needed.