SILVA 125T Compass with Pillar Manual

FULL VERSION MANUAL

125T

Art.no 37199-0011 (MN), 37199-0013 (ME), 37199-0015 (MS)

SILVA MARINE COMPASS 125T

Our pe destal com pass desi gned for boats and y achtsmen t hat demand ab solute accurac y and
a steady car d in all condi tions and heeling a ngles. Th e SILVA 125T compass is suitab le for most
larg er sailing b oats and motor yac hts and owi ng to the effe ctive dampenin g of the compas s
card , it is the corr ect choic e even for lar ger speedb oats.

The co mpass per mits up to 45° heeling and unlimi ted tilting fore and a ft. The two ext ra lubber
line s at 45° offs et permit r eading fro m the rail or an o ff steeri ng position mounting. The lubb er
line s are counter -balance d and will remain ve rtical ev en in rough se as. All lub ber lines ar e
easil y read throu gh the patented tra nsparent compas s card. A sig hting peg fr om the centre
elimi nates paralla x errors an d facilit ates off cou rse beari ngs.

125T ha s an apparen t scale size of 12 5 mm, a gimbal led cradle a nd the standard 175 mm base
plate fits m ost steer ing pedest als. Fur ther features inc lude the pos sibilit y to compens ate for
magne tic field distur bance and it is also p ossible to a dd a heeling c ompensat or. The int egrated
illum ination in th e adjustab le protect ion cover of fers ideal night v ision.

PRODUCT OVERVIEW

The packaging includes:

• Compass unit

• Compensator adjuster

• Mounting kit

• Illumination

• Pedestal

• Sof t cover

ILLUMINATION

This compass can b e supplied w ith illumination 12 V.
Adaptatio n to 24V-illu mination co nnected in s eries by a re sistor of 27 0 ohm, 0.5 W.

POSITIONING

The co mpass shou ld be positi oned where it can be easil y read from al l angles, e ven in dark­ness w hen illumi nated. Posi tion the comp ass as far as possible aw ay from iro n objects o r other
disturbin g magnetic s ources as lo ud speakers, win dscreen w ipers, ins trument s etc.
NB! SILVA s electronic ins truments do not distur b the compas s.

When c hecking fo r magnetic di sturbance, use a n ordinar y SILVA handhel d compass , held in the
fore -and-aft direc tion aroun d the intende d mounting si te. In most ca ses 0.5 to 1 met re betwee n
the com pass and the s ource of dis turbance w ill be sufficie nt. Do not for get to switc h on all
elec trical eq uipment nea r the compas s when makin g this check .

MOUNTING

The SI LVA 125 come s with a socket Ø 175 mm (7.0”) which f its most s tandard st eering sy stems.

The co mpass shou ld be mounted o n a firm base to prev ent oscill ation of the card. To avo id
engin e vibrations a ru bber sheet c an be placed u nder the soc ket.

When m ounting on a st eering pedest al the base mu st have a Ø 175 mm (7.0”) minim um. If the
base i s smaller, a teak- or mahogany plate c an be mounte d on the pedes tal as a base f or the
socket.

1. Loos en the black m ounting ri ng (see fig) .

2. Loos en the 2 screw s and lift off the compass.

3. Alig n the socket ex actly in the fore-and-a ft direction an d fit it to the ba se with 4 screws of
non- magnetic ma terial. The scre ws should b e fitted in th e centre of the o val holes in t he
bottom of the s ocket to allo w for adjustment la ter. N.B. Mount th e socket wit h the compen­sation adju ster screw s to starbo ard.

4. Mount t he compass a nd the mounti ng ring with the lamp bod y and the lubber line towar ds
the bow.

COMPENSATION AND DEVIATION

Comp ensation i s recommended, if t he deviati on is more than 5 degre es, when th e compass is
in its normal mounting position.

If the er ror is less than 5 de grees, it i s sufficient to produce a d eviation t able.
The co mpensation is mad e with the two comp ensation a djuster screws “ E/W” a nd “N/S” in
orde r to reduce the e rrors caused by iron ob jects or ot her source s of magnetic d isturban ce.

When c ompensat ing, the boa t should be in an a rea that is not affe cted by per manent- or ele c­tromagnetic disturbances.

1. Aim t he boat due North an d turn the ”N /S” screw un til the compa ss reading is 0°.

2. Aim th e boat due Eas t and turn the ”E/ W” scre w until the compass r eading is 90 °.

3. Aim th e boat due Sou th. If the compass d oes not show 18 0°, turn the ”N/S” s crew until th e
erro r is halved. (E .g. If the er ror is 6° - turn the screw until th e error is 3 °.)

4. Aim th e boat due Wes t. If the comp ass does not s how 270°, tu rn the screw until th e error is
halved.

5. Go through th e procedur e again and che ck the adjus ted values .

6. Check the compass e very 20 de grees and produc e a deviatio n table and de viation curve.

7. Mark the p osition of th e compass on t he base if the c ompass is r emoved.

As the magne tic conditi ons in a boat ar e liable to cha nge, we reco mmend chec king of the com ­pass o nce a year and alway s after inst allation of equip ment which m ight affec t the compa ss.

NB! Do no t regard the c ompass as a n accurat e navigati onal inst rument un til the comp ensa­tion is c arried o ut and the dev iation ta ble is prod uced. Whe never in dou bt, pleas e seek the
advi ce of a compa ss adjust er!

MAINTENANCE

To clean th e compass , use a mild soa p solution o r detergent . Do not use str ong solven ts, such
as spir it, aceton e or petroleum. Th e compass tolera tes temper atures dow n to -30°C. I t is
advisable not to subjec t it to sever e cold for long p eriods.

TECHNICAL SPECIFICATIONS

Type of co mpass: S ailing / Power boat c ompass
Illumination: Yes, 12V. Col our: red
Lubb er lines: Yes , centre and si de view at 45° (back)
Cent re sightin g peg: Yes
Gimballed cradle: Yes
Accuracy: ±0.5°
Apparent card diameter: 125 mm (4.9 inc h)
Compensator: Yes
Card t ype: Flat
Card graduation: Top: ever y 5°
Heeling angle: Roll: 45° Pitc h: 30°
Heeli ng angle sc ale: No
Mounting: Pedestal, white plastic
Mounting angle: -10° to +10°
Temp operating range: -10°C to +70 °C (14°F to 158°F)
Storage temperature: -30° C to +70°C (-22° F to 176°F)
Adjustable cover: Yes
Material: Acr ylic /ABS
Weigh t: 1900 g
Dimensions:

PROTECT THE ENVIRONMENT.

The Co mpasses s hould be recycl ed and must no t be thrown in t he regular tras h.
Dispose the se items in ac cordance w ith applic able local r egulations.
For more information please visit www.silva.se

Visit: www.silva.se
for more i nformation ab out the
Waste Electrical and Electronic
Equipment (WEEE) Directive.