7.3.1 Daylight signalling lamps should not be
solely dependent upon the ship's main or emergency sources of electrical
energy.
7.3.2 Daylight signalling lamps should be provided
with a portable battery with a complete weight of not more than 7.5
kg.
7.3.3 The portable battery should have sufficient
capacity to operate the daylight signalling lamp for a period of not
less than 2 h.
7.3.4 The power supply of daylight signalling
lamps should meet the requirements of resolution
A.694(17) and the applicable international standards.footnote