Page 43 - Perko

Choosing A Replacement Pole Light

2. Select a Rake Angle
1. Select a Globe Style
Full Output Reduced Glare Bi-Color 0° Rake 5° Rake Adjustable Rake

2

Navigation Lights

Globes come in 3 basic types:
Rake is determined by the pole, base and base location angles. Rake is
1. White all-round Full Output allows for full cockpit illumination.
important for all reduced glarelights to insure that light output is correct.
2. White all-round Reduced Glare helps preserve night vision while under way.
The most common rake angles are 0°, 5° and 16°. Custom made poles
3. Bi-Colorlights are used on the bow instead of a fixed surface mount light. Choose
often have non-standard rake angles. Choose from 0°, 5°, 16°, 45° or fully
from models with or without integral white utility light.
adjustable versions (Delta, Stealth, and Omega Series).
3. Determine if the Key Slot Screw 4. Determine the Pole Length
Position is Important
Navigation rules state that the center of
the bulb filament of white lights must be
mounted at least 1 meter (approx 40”)
above center of the filament of the
red/green lights. The "vertical height" of
a light is measured from the deck of the
boat to the center of the light filament.
Vertical Ht
Most pole lights (all of Perko’s) are sold
by their "nominal (or approximate)
Overall Length
Key Slot overall length". Three factors affect the
Deck difference between overall length and
Screw Locations
vertical height. 1) The depth the pole
goes into the base is (typically less than
two inches). 2) The distance from the
filament to the top of the light is
(typically less than an inch). 3) Rake angle can shorten the vertical
Most manufacturers insert screws into an upper or lower location on the
pole to position the light and hold it properly oriented in the base. The height by as much as an inch (for bends under 16 degrees). So, as a
location of this screw varies by manufacturer and model. Determine the key general rule, the installed "vertical height" will be between 2 and 4
slot screw position needed for your base and match it to the pole you select. inches less than the nominal length of the pole. Select the shortest
All Perko plug in bases accept the upper screw position and all Perko lights light that will insure that the requirements are met after taking this
have an upper screw. Perko Alpha, Delta, Omega, and Stealth Series difference into account. Be sure the light is long enough to be seen
replacement lights offer the option to locate the screw in either place. over any obstructions. If this light is too long to store easily, consider
a fold-in-half light for easier storage.
5. Determine a Collar Type 6. Determine the Number of Pins

Locking Large Threaded
Collar Collar

2 Pin 3 Pin 3 Pin Base
Some manufacturers use different types of collars to assure that their pole
lights are held securely in the base. All Perko lights are shipped with at least Bi-color lights are available with and without an integral white
one collar (a locking collar, a large threaded collar, or a small threaded col- utility light. Those lights with a utility light require 3 contact pins.
lar). Determine whether a collar is needed for your base and match it by Determine if 2 or 3 contact pins are needed for your base and match
collar type to the pole you select. All Perko bases require collars. it to the pole you select.

Visit www.perko.com for installation instructions and technical drawings on most PERKO products. 43
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