4.1 Where two radars are required to be carried
they should be so installed that each radar can be operated individually
and both can be operated simultaneously without being dependant upon
one another. When an emergency source of electrical power is provided
in accordance with the appropriate requirements of chapter II-1 of the 1974 SOLAS Convention,
both radars should be capable of being operated from this source.
4.2 Where two radars are fitted, interswitching
facilities may be provided to improve the flexibility and availability
of the overall radar installation. They should be so installed that
failure of either radar would not cause the other radar to be adversely
affected.