13.2.1 Only those instruments are considered here
which relate to the navigation of the craft as opposed to the safe
functioning of the craft and the following represents the minimum
required for normal safe navigation unless it is demonstrated to the
Administration that an equivalent level of safety is achieved by other
means.
13.2.2 The navigation equipment and its installation
should be to the satisfaction of the Administration. The Administration
should determine to what extent the navigational equipment provisions
of this chapter do not apply to craft below 150 gross tonnage.