Catalina Capri 22 Owner's Manual page 55

E-4
12/96
4.11.1.2 The location of the mast base shall be such that
persons on the boat can avoid physical contact with the
mast or the base.
4.11.1.3 The base should extend as high as possible, and
provision shall be made to plug in the upper section of the
lightning mast so that it will not be displaced by the
rolling and pitching of the boat in rough water.
4.11.1.4 The temporary lightning protective mast shall be
all metal, or other material if provided with a conductor,
with a conductivity at least equal to a #4 AWG (21.2mm
2
)
conductor.
NOTE: A solid stainless steel whip antenna or
equivalent, that has a conductivity less than a #4 A WG
(21. 2mm
2
)
conductor, may be used, because of its higher
melting temperature, but it wiU not provide as low a
resistance path for the lightning.
4.11.1.5 The temporary lightning protective mast shall be
connected to a submerged ground plate of at least one
square foot (0.1 m
2
)
in area.
© 1996 American Boat & Yacht Council, Inc.
4
4 .11.2 Open Daysailers - As stainless steel rigging may
not provide an adequate conductive path for the discharge
of lightning currents, protection will depend on the
grounding of all rigging as well as the metal masts, or the
continuous metallic tracks on nonmetallic masts. These
shall be connected at the lower ends to a lightning
grounding plate, or a lightning grounding strip located
directly below the mast.
4.11.2.1 Metallic rudders at the aft end of the boat shall
not be used as the lightning ground for the mast because of
the need for a long horizontal conductor to the aft end of
the boat.
4.11.2.2 The tiller, or other connections to metallic
rudders that the operator will contact, shall be non-
conductive materials.
4.11.2.3 Metallic keels or centerboards shall be directly
connected to the lightning grounding plate or strip, and
may serve as the lightning grounding means if they have
the required one square foot (0.1 m
2
)
area in contact with
the water. If a centerboard is used as the lightning
grounding means, a warning sign shall be provided that
clearly states that the centerboard must be in the down
position to functl.on as a lightning ground.