Compass Mil Specs.pdf

METRIC

MIL-PRF-10436N

31 OCTOBER 2003

SUPERSEDING

MIL-PRF -10436M

15 SEPTEMBER 1998

PERFORMANCE SPECIFICATION

COMPASS, MAGNETIC, UNMOUNTED:

LENSATIC, LUMINOUS, 5 DEGREE AND 20 MIL

GRADUATIONS, WITH CARRYING CASE

All Departments and Agencies of the Department of Defense approve this specification for use.

The original issue of this specification replaced MIL-C-10436.

1. SCOPE

1.1 Scope . This specification covers an induction-damped, lensatic, unmounted, magnetic

compass, with 5 degree and 20 mil graduations, for individual use during day and nighttime.

2. APPLICABLE DOCUMENTS

2.1 General . The documents listed in this section are specified in sections 3 and 4 of this

specification. This section does not include documents cited in other sections of this

specification or recommended for additional information or as examples. While every effort has

been made to ensure the completeness of this list, document users are cautioned that they must

meet all specified requirements documents cited in sections 3 and 4 of this specification, whether

or not they are listed.

2.2 Government documents.

2.2.1 Other Government documents and publications . The following other Government

documents and publications form a part of this document to the extent specified herein. Unless

otherwise specified, the issues are those cited in the solicitation.

Comments, suggestions, or questions on this document should be addressed to: U.S. ARMY

TOPOGRAPHIC ENGINEERING CENTER, ATTN: CEERD-TS-T, 7701 TELEGRAPH

ROAD, ALEXANDRIA, VA 22315-3864 or emailed to pd-te@tec.army.mil . Since contact

information can change, you may want to verify the currency of this address information using

the ASSIST Online database at www.dodssp.daps.mil .

AMSC N/A

FSC 6605

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

MIL-PRF-10436N

OTHER GOVERNMENT DOCUMENTS

DEPARTMENT OF INTERIOR, U.S. GEOLOGICAL SURVEY

ISOGONIC CHARTS

Epoch 1995 Map No. GP1002-D Magnetic Declination of the U.S.

Epoch 1995 Map No. GP1002-F Magnetic Total Intensity of the U.S.

Epoch 1995 Map No. GP986-V

Magnetic Vertical Intensity of the U.S.

Epoch 1995 Map No. GP986-H

Magnetic Horizontal Intensity of the U.S.

(Application for copies should be addressed to Map Distribution, U.S. Geological Survey, Box

25286, Federal Center, Denver, CO 80225.)

2.3 Order of precedence . In the event of a conflict between the text of this document and the

references cited herein, the text of this document takes precedence. Nothing in this document,

however, will supersede applicable laws and regulations unless a specific exemption has been

obtained.

3. REQUIREMENTS

3.1 Description . The compass (see Figure 1A and 1B) shall be an induction-damped, hand-

held, north-seeking instrument with internal, self-exciting light source.

3.2 Firstarticle . Unless otherwise specified (see 6.2), a sample shall be subjected to first

article inspection.

3.3 Design, materials, and manufacturing processes . Unless otherwise specified, the design,

materials, and manufacturing processes are the prerogative of the contractor as long as all

articles submitted to the government meet the operating, environmental, and support

requirements specified.

3.3.1 Material deterioration prevention and control . The compass shall be fabricated from

compatible materials, inherently corrosion resistant or treated to provide protection against the

various forms of corrosion and deterioration to which they are susceptible.

3.4 Operatingrequirements.

3.4.1 Graduations. The compass shall be graduated in degrees and mils. The degree

graduations shall be semi-gloss red (see 6.11) and identified at 5 degree intervals. They shall be

numbered every 20 degrees, with north being 0 degrees. The north arrow may be used in lieu of

the "0" degree marking. The mil graduations shall be semi-gloss black (see 6.11) and identified

at 20 mil intervals. They shall be numbered every 200 mils, using only hundreds and thousands

digits (i.e., 2, 4, 6, …64 represent 200, 400, 600, …6400 mils). North shall be identified as 6400

mils. All graduations shall be distinguishable in day and night conditions (see 4.4.1.1).

3.4.2 Scale. The compass shall have a scale of 1:50000 with graduations of 100 meters, 0 to

6000 minimum, along the length of the compass, in the opened configuration (if applicable) (see

4.4.1.2)

MIL-PRF-10436N

3.4.3 Sightingdevice . The compass shall have a sighting mechanism, capable of aiming the

compass in day and night conditions (see 4.4.1.3).

3.4.4 Bezel . The compass shall have an attached bezel (ring with luminous line), capable of

rotation through 360 degrees in either direction. Rotation shall be limited to 3 degree increments

with tactile (non-audible) feedback. There shall also be means to prevent accidental movement

or removal of the bezel (see 4.4.1.4).

3.4.5 Free floating assembly . When a free floating assembly is employed, the compass shall

incorporate a mechanism that restricts all movement of the dial assembly when the compass is

not in use, and automatically releases the dial assembly for use (see 4.4.1.5).

3.4.6 Lanyard . A neck lanyard 2.5 ±0.5 millimeters (mm) thick with the ends permanently

joined to form a loop, 150 ±5 centimeters (cm) in circumference, shall be attached to each

compass. The lanyard shall be lusterless green (see 6.11) and made from a suitable, pliable,

durable material (see 4.4.1.6).

3.4.6.1 Lanyard attachment . The lanyard and compass attachment point shall withstand a

force of 34 kg without damage, breakage or separation from the compass (see 4.4.1.6.1).

3.4.7 Carrying case . A carrying case shall be furnished with each compass. The case shall be

a pouch made from a suitable, pliable, durable material, with a single heavy duty fastening

system on the fold over flap closure. The carrying case material shall be lusterless green (see

6.11) and the fasteners shall be lusterless black (see 6.11). It shall be provided with a means for

drainage and for attachment to belts 7 cm wide. The case shall be constructed for repeated use

and to facilitate storage and retrieval of the compass and instruction card (see 4.4.1.7 and

4.4.3.4).

3.4.7.1 Instruction card . Instructions in semi-gloss white (see 6.11) lettering shall be printed

on a semi-gloss green (see 6.11) card, 6 x 10 cm nominal size that shall not be damaged by water

or moisture. One card, without being folded, shall be inserted into each compass carrying case

(see 4.4.1.7.1). Additional instruction cards shall be provided as specified (see 6.2). Data,

printed legibly on cards, shall be as follows:

INSTRUCTIONS:

(1) Align luminous line on compass ring with sight lines.

(2) Turn ring counterclockwise by desired number of clicks. Note: Number of clicks =

degrees azimuth divided by 3. Example: 51 degrees azimuth / 3 = 17 clicks

counterclockwise.

(3) Turn compass until north arrow lines up with luminous line on ring.

(4) Sight line now points to azimuth.

3.4.8 Magnetic performance . The compass shall provide magnetic performance as specified

in 3.4.8.1, when operated in accordance with the instructions in 3.4.7.1. It shall be capable of

being read to an accuracy that ensures an error not greater than 40 mils, in any ambient light,

under adverse field conditions (see 4.4.1.8).

MIL-PRF-10436N

3.4.8.1 Magnetic standard . The compass shall operate in a magnetic field with a horizontal

component equal to the local standard ± .01 oersted and vertical component of the local standard

±.03 oersted (Continental United States). The local standard shall be established using the

U.S. Geological Survey (Department of the Interior) Epoch 1995 Map No. GP1002-D, Magnetic

Declination of the U.S.; Epoch 1995 Map No. G1002-F, Magnetic Total Intensity of the U.S.;

Epoch 1995 Map No. GP986-V, Magnetic Vertical Intensity of the U.S.; and Epoch 1995

Map No. GP986-H, Magnetic Horizontal Intensity of the U.S.

3.4.9 Mechanical performance . The compass shall meet the subordinate requirements with

the compass in the operational configuration and away from all magnetic effects external to the

compass caused by buildings, vehicles, electrical devices, etc.

3.4.9.1 Damping . The magnetic assembly, shall come to rest within 6 seconds of time after

being deflected 540 ±20 mils from a position of equilibrium (see 4.4.1.9.1).

3.4.9.2 Freedom of rotation when tilted . The operation of the compass shall not be adversely

affected when it is tilted 8.0 ± 0.1 degree from the horizontal and rotated 360 degrees in a plane

normal to the longitudinal axis of the pivot (see 4.4.1.9.2).

3.4.9.3 Compass error . The error in magnetic azimuth, including that caused by pivot friction,

shall not be greater than 40 mils (see 4.4.1.8).

3.4.9.4 Friction error . The error caused by friction between the pivot supporting the dial and

its bearing shall not be greater than 20 mils (see 4.4.1.9.3).

3.4.10 Illumination . The compass shall have internal, self-exciting light sources of constant

luminosity for sighting and reading. In addition, the dial assembly shall have a light source on

the permanent magnet to indicate north and the bezel crystal shall have a light source to aid in

setting readings and sighting. The "E" (east) and "W" (west) markings shall also be illuminated.

All sources shall be mounted flush with or recessed in their mounting surfaces and encapsulated

to inhibit damage (see 4.4.1.9.4).

3.4.10.1 Luminosity . Luminous material, in the final form, shall have a peak spectral output

of 530 ±30 nanometers. The brightness of the luminous sources installed in the completed

compass shall be sufficient to allow the performance of compass functions in any ambient light

and under any of the environmental conditions specified herein (see 4.4.1.9.4.1). Self-exciting

luminous sources shall have a minimum service life of 12 years (see 6.2).

3.5 Environmental requirements .

3.5.1 Water leakage . The complete compass shall be capable of being submerged into water

without leakage into the interior of the compass, where it will adversely affect performance

directly or indirectly (see 4.4.2.1).

3.5.2 Shock . The compass shall not be damaged or suffer performance degradation when

dropped from a height of 90 cm (see 4.4.2.2).

3.5.3 Low and high temperatures . When exposed to temperature extremes of -44°C and 68°C,

the compass shall function properly and shall not be damaged (see 4.4.2.3).

MIL-PRF-10436N

3.5.4 Thermal shock (vials only) . Self-excited luminous sources shall not be damaged by

thermal shock caused by sudden temperature changes of -52°C to 68°C (see 4.4.2.4).

3.6 Support requirements .

3.6.1 Dimensions and weight . The compass shall not be greater than 9 cm long, 8 cm wide

and 4 cm high, in its closed or stored configuration. Its weight shall not be greater than 170

grams (see 4.4.3.1)

3.6.2 Radiological containment . If radioactive luminous light sources are used (see 3.4.10),

these subordinate requirements are mandatory.

3.6.2.1 Contamination . Removable contamination activity of the completed compass shall be

less than 900 disintegration rate per minute (dpm) at the time of production (see 4.4.3.2.1).

3.6.2.2 Diffusion . A completed compass with all the luminous vials installed shall not leak

radioactive material in excess of 0.05 microcuries in 24 hours (see 4.4.3.2.2).

3.6.3 Impact durability of vials . If radioactive self-luminous source vials are used, the vials

shall show no evidence of leakage, breaking, checking, shattering or spalling when the compass

is dropped onto a hard surface (see 4.4.3.3).

3.6.4 Durability . The case, compass body, crystal, and moving parts shall meet all of the

requirements that are described, herein, for a minimum service life of 12 years (see 4.4.3.4).

3.6.5 Finishes .

3.6.5.1 Wear surfaces . Any exterior surfaces subject to wear from repeated use shall be

finished in a manner that produces a wear resistant semi-gloss black finish (see 4.4.3.5.1)(see

6.2)(see 6.11).

3.6.5.2 Non-wear surfaces . All other external surfaces shall be treated and painted for

corrosion protection, as necessary. The finish coat shall be semi-gloss green enamel (see

4.4.3.5.2)(see 6.11).

3.6.5.3 Damping shell . The inside (visible) surfaces of the damping shell shall be treated and

painted for corrosion protection. The finish coat shall be semi-gloss white enamel (see 6.11)(see

4.4.3.5.3).

3.6.6 Markings .

3.6.6.1 Identification . Lot identification shall be permanently marked on the compass, inside

the cover (if applicable) to include year and month of manufacture and lot number. The top of

the compass shall be marked with the identification and part number of the manufacturer, and

National Stock Number (NSN) (see 4.4.3.6.1).

3.6.6.2 Radiation marking . If radioactive materials are used in the production of the compass,

one of these subordinate requirements is mandatory (see 6.2).

3.6.6.2.1 Specific license marking . The bottom of the compass shall be permanently marked

as required by applicable Nuclear Regulatory Commission Byproduct Materials License. It shall

include the radiation caution symbol (not in color), quantity of isotope, the byproduct-materials

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: