MHEES_Purchase_Description_-_20121212.pdf

Medium Hybrid Expeditionary Energy System Purchase Description

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Purchase Description

Medium Hybrid Expeditionary

Energy System

(MHEES)

Prepared by

Product Manager - Expeditionary Power Systems

Marine Corps Systems Command

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SCOPE

1.1 Introduction

To increase energy independence and flexibility of deployment options, the Marine Corps has been fielding renewable and hybrid energy programs to include the Ground Renewable

Expeditionary Energy Network System (GREENS). GREENS reduces fuel and resupply requirements for low power applications but reductions in fuel consumption are also needed for higher power applications. These higher power applications are looking for solutions that can reduce resupply needs, lighten the MAGTF and maintain highly flexible deployment options.

The next generation of generators, Advanced Medium Mobile Power Source (AMMPS), is more efficient than the current Tactical Quite Generator (TQG) family, however more efficient ways to control, operate and manage these generators in a hybrid set up is needed.

The goal of this improvement will be to address the next level of power capability above the

GREENS type system, while developing the smallest, lightest and most cost effective system at this increased power level.

Selected items identified in Paragraph 3.0 of this document are Critical Performance Parameters.

Critical Performance Parameters (CPPs) are essential to the performance of the unit, and must be met to satisfy the Government’s minimum requirements. Non-CPP items of this document are objectives that are considered value added attributes. A trade-off shall be done on these parameters to determine which parameters and to what extent these parameters should be included in the design of the system. The offeror may also propose their Value Added features not listed here.

1.2 Current System Description

The USMC currently fields a variety of power generation and management systems that are related to the Medium Hybrid Expeditionary Energy System (MHEES) effort. Systems relevant to the MHEES program include the 5kW and 10kW AMMPS generator, 3kW TQG, 2kW

Military Tactical Generator (MTG), 5kW and 15kW Mobile Electrical Power Distribution

System Replacement (MEPDIS-R) power distribution, and the GREENS systems. Many of these systems will be subcomponents or will work in conjunction with the MHEES system.

More information about these systems can be found at:

http://www.marcorsyscom.usmc.mil/sites/pmeps/default.asp

1.3 Overview of Desired System

The USMC has identified a need for power systems like GREENS that can optimize the use of available solar, generators, energy storage or other sources, to reduce fuel consumption in larger power demand areas. This R&D effort is looking at development of a system to meet this need.

This higher power hybrid system will be referred to as the Medium Hybrid Expeditionary Energy

System (MHEES). The MHEES will allow for powering small patrol bases, stand alone

Version 20121212 Page 3 of 16 weapons systems and remote sensing sites. The MHEES will act as a hybrid system able to receive power from different energy sources, smartly manage these sources to conserve the most fuel possible, and distribute this power to multiple types of end items. This hybrid system is intended to be used and transported in an uncontrolled military environment and should be highly ruggedized. Typical military environmental parameters can be found in the Standard

Marine Corps Environmental Specifications provided at the end of this PD. It is highly desired to minimize the size and weight and to maximize efficiency of this system. The MHEES should break down to allow 4 Marines to move system components around the battlefield (excluding generator). Final system cost should also be considered in this tradeoff. A tradeoff should be done to determine the best design to optimize performance and cost characteristics.

The following metrics are important to the MHEES system and are listed from most important to least important:

1. Fuel Consumption

2. Weight

3. Scalability

4. Manpower Burden

5. Transportability

6. Load Priority & Shedding

7. Multiple Generator Connection

8. Employed Footprint

9. Training

10. Supportability

11. Modularity

12. Renewable Impact

13. Noise

14. Variable Output

15. Local Grid Power connection

MHEES is seen as a trailer movable system which can be deployed on or off trailer with no material handling equipment (i.e. forklift) needed (other than the generator). A core MHEES, which is fully mission capable, can be moved on one trailer, however this one trailer may not include all the input and output capability of the MHEES power management system. The concept of operations is that a core MHEES trailer could move into a location, be combined with existing power generation assets at the location if available, or be fully able to provide the 5kW sustained, 10kW peak load by itself. With just the core MHEES there will be the maximum level of fuel savings, over generator only use, that can fit on one (1) Marine Corps Chassis Light

Tactical Trailer (MCC-LTT). The core MHEES can be augmented with a second trailer caring additional inputs (Solar, generators, batteries) to increase fuel savings of the MHEES system.

This second trailer may or may not be deployed with the core MHEES depending on the length of time Marines will be at the location.

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2.0 APPLICABLE DOCUMENTS

This document is subject to all applicable laws and regulations in effect, unless specifically exempted by the Government.

The following documents form a part of this specification to the extent specified herein. In the event of conflict between the documents referenced herein and the contents of this specification, the contents of this specification shall be considered a superseding requirement. In the event the listed documents have been superseded, the most current version or replacement document shall be used.

Number Title Revision

MIL-STD-461

Requirements For The Control Of Electromagnetic Interference

Characteristics Of Subsystems And Equipment F

MIL-STD-810

DOD Test Method Standard for Environmental Engineering and

Laboratory Tests G

MIL-STD-129 Military Marking for Shipment and Storage P(4)

19 Sep 2007

MIL-STD-130 Identification Marking of U. S. Military Property

IEEE STD-315-1975

IEEE Standard Graphic Symbols For Electrical And

Electronics Diagrams

MIL-HDBK-1857 Grounding, Bonding, Shielding Design Guidelines

MIL-HDBK-419

Grounding, Bonding And Shielding For Electronic Equipment

And Facilities, Volumes 1 & 2 A

NFPA 70 National Electrical Code 2005

MIL-HDBK-454 General Guidelines For Electronic Equipment A

MIL-STD-1332

Definitions Of Tactical, Prime, Precise, And Utility

Terminologies For Classification Of The DOD Mobile

Electric Power Engine Generator Set Family

B

MIL-STD-1275

Characteristics Of 28 Volt DC Electrical Systems In Military

Vehicles D

MIL-STD-882 Standard Practice for System Safety

MIL-STD-2073-1 DoD Standard Practice for Military Packaging

TMS9310-AQ-SAF-010 Technical Manual for Navy Lithium Battery Safety Program 18 Oct 2010

MIL-PRF-32383 Performance Specification Sealed Rechargeable Batteries 16 Jun 2011

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3.0 SYSTEM PERFORMANCE

3.1 The MHEES will consist of the following components:

a. Controller (delivered with system)

b. Energy storage system (delivered with system)

c. Generator/s. (Generator provided GFE. Provided back to government as modified

GFE)

d. Solar panels (Provided GFE)

e. Trailer systems for transport (delivered with system)

f. Power distribution and cabling (delivered with system)

3.2 Power Capability

3.2.1 All MHEES electrical components shall be sized for a minimum of 10kW rated electrical output in accordance with MIL-STD-1332 if enough electrical input is available. THIS

IS A CRITICAL PERFORMANCE PARAMETER.

3.2.2 The MHEES shall be able to sustain an average electrical output of 5 kW in accordance with MIL-STD-1332. THIS IS A CRITICAL PERFORMANCE PARAMETER.

3.2.3 It is desired that the MHEES be able to sustain 10 kW peaks of 10 minutes in duration.

3.2.4 The MHEES system shall be able to accept power from solar (32 - 70VDC), 108-

130VAC single phase. THIS IS A CRITICAL PERFORMANCE PARAMETER.

3.2.5 It is desired that the MHEES be able to accept power from 22-32V DC.

3.2.6 It is desired that the MHEES be able to accept power from 197-229V AC (60 Hz) three phase power.

3.2.7 It is desired that the MHEES be able to accept a 216-250V AC (50Hz) power into the system.

3.2.8 The MHEES shall be able to accept power from the family of AMMPS generators, solar, batteries and vehicle based DC power. THIS IS A CRITICAL PERFORMANCE

PARAMETER.

3.2.9 A minimum of 5kW of generator power shall be provided on the MHEES trailer.

This/These generator/s shall consist of some combination of the 3kW TQG, 5kW

AMMPS, and/or 10kW AMMPS. THIS IS A CRITICAL PERFORMANCE

PARAMETER.

3.2.10 It is desired that the generators provided on the MHEES system be considered fully fueled for weight calculation purposes.

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3.2.11 It is desired that the MHEES be able to automatically, with no user input, turn off and on the 3kW TQG and 5kW and 10kW AMMPS generators to minimize fuel consumption vs.

load.

3.2.12 It is desired that the MHEES inputs ratings be optimized to maximize system flexibility and minimize fuel utilization for power delivered. System flexibility is defined as the ability of the system to provide power to a wide variety of loads with varying amounts of different input power types.

3.3 Physical Characteristics

3.3.1 A full mission capable core MHEES shall fit on one (1) USMC M1102 Marine Corps

Chassis Light Tactical Trailer (MCC-LTT) trailer. A Full mission capable core MHEES is defined as meeting all CPPs in this purchase description but possibly not all objectives.

THIS IS A CRITICAL PERFORMANCE PARAMETER.

3.3.2 The MHEES shall fit on no more than two (2) MCC-LTTs. THIS IS A CRITICAL

PERFORMANCE PARAMETER.

3.3.3 It is desired that the MHEES fits on one (1) USMC M1102 Marine Corps Chassis Light

Tactical Trailer (MCC-LTT).

3.3.4 It is desired that each component of the MHEES be moveable by no more than 4 Marines

(excluding generator/s).

3.3.5 The MHEES shall be able to be deployed both mounted to an MCC-LTT trailer and deployed dismounted from the trailer on the ground. THIS IS A CRITICAL

PERFORMANCE PARAMETER.

3.3.6 It is desired that the MHEES system weight and the weight of individual components be minimized.

3.3.7 It is desired that the number of cables need to set up the MHEES system be minimized.

3.3.8 It is desired that the MHEES volume be minimized both in a transportation configuration and in a deployed foot print configuration.

3.3.9 It is desired that the MHEES main user interface controller can be dismounted from the trailer by 4 Marines and operated with a minimum standoff distance from generators and solar panels of at least 40 feet when deployed.

3.3.10 It is desired that the MHEES be expandable with additional generators or batteries or solar without ceasing operation.

3.3.11 It is desired that the MHEES provide basic user feedback to include but not limited to:

Output power level from each output connector

Input power level from each input connector

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State of charge of batteries

Faults in system

System run time meter

3.4 Solar Panel Array

3.4.1 The MHEES shall be able to use the existing USMC Integrated Solar Panel Case

Assembly (ISPCA) fielded with the GREENS system. The ISPCA utilizes the Sanyo

HIT 220A solar panel. Each ISPCA weight 155lbs, has 440W solar rating, and has a volume of 9”x35”x66”. THIS IS A CRITICAL PERFORMANCE PARAMETER.

Figure1. ISPCA description

3.4.2 It is desired that the MHEES be expandable and upgradeable to utilize other solar panel technology.

3.4.3 In addition to working with the ISPCA the MHEES can assume an Advanced ISPCA

(AISPCA) will be available by fielding. The AISPCA will generate 880W in the same volume and weight as the ISPCA.

3.4.4 Space and transportability design factors for the ISPCA or the AISPCA should be included in the MHEES design.

3.4.5 It is desired that the MHEES controller be able to accept the maximum amount of solar input practical. A minimum controller capability for 5kW for solar input is desired.

3.5 Electrical Characteristics

3.5.1 It is desired that the MHEES has a power distribution kit designed to distribute 120V AC

(60Hz) power within a 12’ x 20’ soft shelter.

3.5.2 The MHEES shall provide 208 Volts AC (60 Hz) output with a surface mounted IEC

60309 receptacle, 3-phase, 5-wire, 30 Amp, 120/208V, 530R9W female pin & sleeve connector. THIS IS A CRITICAL PERFORMANCE PARAMETER (CPP)

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3.5.3 The MHEES shall provide a 103-132V AC (60Hz) output on the system. THIS IS A

CRITICAL PERFORMANCE PARAMETER (CPP)

3.5.4 It is desired that the MHEES provide a 216-250V AC (50Hz) output on the system.

3.5.5 Output power shall be of the quality to meet MIL-STD-1332B. THIS IS A CRITICAL

PERFORMANCE PARAMETER (CPP)

3.5.6 It is desired that the MHEES provides a 24 Volts DC output on the system not rated higher than 50Amps.

3.5.7 It is desired that the MHEES directly connect with the current USMC fielded Mobile

Electric Power Distribution suite (MEPDIS-R) in the 5 kW and 15kW distribution panel.

Information these distribution panels can be found at http://www.marcorsyscom.usmc.mil/sites/pmeps/default.asp.

3.5.8 It is desired that the MHEES be at least 90% efficient in solar to battery charge mode.

3.5.9 It is desired that the MHEES efficiency be optimized for each type of power input to output conversion.

3.6 Energy Storage

3.6.1 It is desired that the MHEES provide sufficient energy storage to optimized generator run time, solar input, cost, charge rate, and fuel utilization.

3.6.2 It is desired that MHEES battery modules be hot swappable. It is desired that battery life, both cycle life and shelf life, be optimized. A minimum value of 5 year shelf life, 1 year with no maintenance, and 1000 cycles at expected use conditions is desired.

3.6.3 It is desired that the MHEES battery modules come in a sealed IP67 or better enclosure which cannot be opened by the user or requires tools to open.

3.6.4 It is desired that required safety and shipping documentation such as Material Data Safety

Sheets be provided with the MHEES system.

3.6.5 It is desired that each MHEES battery module have a state of charge on the battery module.

3.6.6 It is desired that the MHEES provide the ability to expand its energy storage capability if more energy storage is available.

3.7 Environmental

3.7.1 It is desired that the MHEES system meeting the environmental requirements for an uncontrolled environment listed in the Standard Marine Corps Environmental

Specifications listed below.

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3.7.2 The MHEES system shall be capable of operating in temperatures ranging from -4ºF to

131°F at full rating of the system. THIS IS A CRITICAL PERFORMANCE

PARAMETER.

3.8 Safety & Human Factors

3.8.1 All components of the MHEES overall design shall incorporate methods to protect personnel from inadvertent contact with voltages capable of producing shock hazards.

This is Critical Performance Parameter (CPP)

3.8.2 It is desired all components of the MHEES require no more than two persons a maximum of 30 minutes to set up and operate in any operating configuration. This time excludes the solar panel set up.

3.8.3 It is desired all components of the MHEES provide permanent warning labels and/or indicators to warn of human hazards.

3.8.4 It is desired all components of the MHEES provide quick reference instructions either printed on the unit itself, or on a waterproof, durable instruction card tethered to the unit.

3.8.5 It is desired all components of the MHEES have controls and displays that are easy to locate and understand.

3.8.6 It is desired all components of the MHEES provide visual indicators that are easy to read in all lighting conditions.

3.8.7 All components of the MHEES shall not present major safety or health hazards while being operated, maintained or supported. This is Critical Performance Parameter

(CPP)

3.8.8 It is desired all components of the MHEES conform to all current Occupational Safety and Health Administration (OSHA) and Environmental Protective Agency (EPA) requirements.

3.8.9 The MHEES system must address generator auto start safety to prevent users from becoming injured during use or maintenance of the system. This is Critical

Performance Parameter (CPP)

3.9 Logistics, Supportability & Training

3.9.1 It is desired all components of the MHEES be sufficiently simple to operate by reading the operator’s manual, as not to warrant formal instruction.

3.9.2 It is desired all components of the MHEES require no tools to operate.

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3.9.3 It is desired all components of the MHEES not require any special tools for repair.

Common tools (those readily available at a Marine Corps intermediate maintenance facility) may be required.

3.9.4 It is desired each MHEES system be provided with all maintenance components needed for at least 500 hours of operation (less oil for generators).

3.9.5 It is desired all major MHEES components be provided with an identification plate showing the manufacturer's model number, national stock number (if assigned), serial number, date of manufacture, CAGE code, Nomenclature, contract number (if assigned), and warranty expiration date.

3.10 PACKAGING, HANDLING, SHIPPING & TRANSPORTATION

3.10.1 It is desired all MHEES packaging be commercial ASTM D3951-98; Level of packing to be Commercial.

3.10.2 It is desired that all cables be labeled and color coded for functionality.

3.10.3 All lithium based batteries shall be shipped in Department of Transportation compliant packaging. This is Critical Performance Parameter (CPP)

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STANDARD

MARINE CORPS

ENVIRONMENTAL

SPECIFICATIONS

Prepared by

Product Manager - Expeditionary Power Systems

Marine Corps Systems Command

Version 20120615 Page 1

1.0 Introduction

This document is intended to be used as an appendix to a technical specification. It consists of standard environmental, transportation, and safety and human factors requirements for Marine

Corps equipment. All specifications shall be considered non-Critical Performance Parameters unless otherwise stated in the main specification document. In the event of a conflict between this document and the technical specification, the technical specification shall be considered a superseding requirement.

2.0 Applicable Documents

Number Title Revision

MIL-STD-461

Requirements For The Control Of Electromagnetic Interference

Characteristics Of Subsystems And Equipment F

MIL-STD-810

DOD Test Method Standard for Environmental Engineering and

Laboratory Tests G

MIL-STD-129P(4) Military Marking for Shipment and Storage 19-Sep-2007

3.0 Applicability to Various Environments

3.1.1 Controlled Environment. A controlled environment is one in which there is a large amount of environmental protection. This may be found in a tent, building or other enclosed structure providing.

3.1.2 Semi-controlled Environment. A semi-controlled environment is one in which there is some environmental protection. This may be found in a warehouse, in storage areas aboard ship, or in an enclosed shipping container.

3.1.3 Uncontrolled Environment. An uncontrolled environment is one in which there is very little to no environmental protection. This may be found outdoors.

3.1.4 Immersion. Replacing the immersion requirement listed below with a 36 inches fording capability.

3.1.5 Operation Altitude. It is desired that the MHEES system excluding generators meet the operational altitude requirement in the environmental specification.

3.1.6 Transit Drop. The MHEES as a system does not need to meet the transit drop requirement in the environmental specification. It is desired that individual components of the MHEES be able to survive a 3 foot drop during system loading and unloading from the trailer.

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The following chart will define which of the environmental conditions apply to each environment.

Para Spec Name Controlled Semi-controlled Uncontrolled

4.1 Environmental

4.1.1 Continued Operation X X X

4.1.2 Storage Temperature Range X X

4.1.3 Humidity X X X

4.1.4 Salt Fog X X

4.1.5 Sand and Dust X

4.16 Immersion X

4.1.7 Drip Proof X X

4.1.8 Rain X

4.1.9 Functional Shock X X X

4.1.10 Operational Altitude X X X

4.1.11 Storage Altitude X X

4.1.12 Cord/Cable Environmental

Resistance X X X

4.1.13 Ice Glaze X

4.1.14 Fungus Resistance X X X

4.1.15 Rail Impact X X

4.1.16 Shipboard Equipment Shock X X

4.1.17 Wind X

4.2 Transportability

4.2.1 Loose Cargo Bounce X X

4.2.2 Shipping Special Considerations X X X

4.2.3 Transit Drop X X

4.2.4 Road Profile X X

4.2.5 Bench Handling X X X

4.3 Electromagnetic Interference

4.3.1 Electromagnetic Interference X X X

4.4 Safety And Human Factors

4.4.1 Shock Hazards X X X

4.4.2 Warning Labels X X X

4.4.3 Controls/Displays X X X

4.4.4 Visual Indicators X X X

4.4.5 Safety and Health Hazards X X X

4.4.6 OSHA/EPA Requirements X X X

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4.0 Performance Specifications

4.1 Environmental

4.1.1 Continued Operation. It is desired that the system, when exposed to these conditions of paragraph 4.0, show no evidence of structural damage, misalignment or malfunction of components, leaks, fractures, abnormal vibrations, or any other irregular operation and continue to operate to specification.

4.1.2 Storage Temperature Range. It is desired that the system remain operable after storage in ambient temperatures ranging from -59 degrees F to +160 degrees F (exclusive of lithium batteries).

4.1.3 Humidity. It is desired that the system be able to operate in at least 95% non-condensing relative humidity at +131 degrees F without damage (tested in accordance with MIL-

STD-810G Method 507.5).

4.1.4 Salt Fog. It is desired that the system meet corrosion resistance (salt fog) requirements

(tested in accordance with MIL-STD-810G, Method 509.5).

4.1.5 Sand and Dust. It is desired that the system meet all requirements and incur neither damage nor degradation of performance in an environment with sand and dust particle concentration up to 1,400 milligrams per cubic meter (mg/m3). Particle sizes shall range from less than 74 micrometers in diameter to 1,000 micrometers with the bulk of the particles ranging in size from 74 to 350 micrometers. (Ref: Mil STD 810G 510.5).

4.1.6 Immersion. It is desired that the system function properly after immersion in water at a depth of 1 meter for 30 minutes (tested in accordance with MIL-STD-810G, Method

512.5, Procedure I). Immersion will be while the system is not operating, and in its transit case, if provided.

4.1.7 Drip Proof. It is desired that the system be splash proof, drip proof, and corrosion resistant. (Ref: Mil STD 810G 506.5 Procedure III)

4.1.8 Rain. It is desired that the system meet rain resistance standards (tested in accordance with MIL-STD-810G, Method 506.5, Procedure I, up to 4.0 in/hr rain fall rate), and operate properly during and after exposure to rain while in any operating or transport configuration.

4.1.9 Functional Shock. It is desired that the system remain operable after functional shock

(tested in accordance with MIL-STD-810G Method 516.6 Procedure I).

4.1.10 Operational Altitude. It is desired that the system operate in any configuration at un-pressurized altitudes up to 15,000 feet Above Sea Level.

4.1.11 Storage Altitude. It is desired that the system be capable of operation after shipment or transportation at un-pressurized altitudes up to 50,000 feet Above Sea Level.

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4.1.12 Cord/Cable Environmental Resistance. It is desired that all cords provided be waterproof

(IP-67 or better), oil resistant, sunlight resistant, and rated for above the systems storage and operation temperature range.

4.1.13 Ice Glaze. It is desired that the system meet all requirements and incur neither damage nor degradation of performance with accumulations of ice glaze, freezing rain, and hoarfrost up to 0.5 inch and up to a specific gravity of 0.9. (reference MIL-STD-810G, Method 521.3).

4.1.14 Fungus Resistance. It is desired that the system be constructed with material resistant to fungus growth under conditions favorable for fungi development and withstand the species of fungus for a minimum period of 28 days (Ref: MIL-STD-810G, Method

508.6).

4.1.15 Rail Impact. It is desired that the system as installed withstand rail impact testing per

MIL-STD-810G Method 526.

4.1.16 Shipboard Equipment Shock. It is desired that the system withstand shipboard equipment shock testing at multiple deck frequencies 8, 15, 25 and 40 Hz per MIL-S-901D.

4.1.17 Wind. It is desired that the system withstand sustained wind speeds up to 50 Miles Per

Hour (mph) and wind gusts up to 60 mph.

4.2 Transportability

4.2.1 Loose Cargo Bounce. It is desired that the system withstand the impact forces and meet the requirements, without damage or permanent deformation, of the loose cargo bounce and vibration test for one hour each, in each of the 3 axis (tested in accordance with MIL-

STD-810G, Method 514.6, Procedure II, Category 5). System will not be in operation and will be in its transit case, if provided.

4.2.2 Shipping Special Considerations. It is desired that the system be capable of being shipped worldwide via commercial air, rail, sea, and highway transportation without special consideration.

4.2.3 Transit Drop. It is desired that the system meet the requirements of transit drop shock

(multiple drops per MIL-STD 810G, Method 516.6, Procedure IV) from a height of 30 inches onto a hard surface and still operate properly. System will not be in operation and will be in its transit case, if provided.

4.2.4 Road Profile. It is desired that system and/or components, when mounted to any tactical vehicle in the USMC inventory, be capable of operating over the mission profile of 60% on-road and 40% off-road as defined below.

Terrain % Operation Roughness

Primary Roads 30 0.1" - 0.3" RMS

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Secondary Roads 30 0.3" - 1.0" RMS

Trails 20 1.0" - 3.4" RMS

Cross country 20 1.5" - 4.8" RMS

4.2.5 Bench Handling. It is desired that the system and all components remain operable after bench handling. (Ref: MIL-STD-810G 516.6 Procedure VI).

4.3 Electromagnetic Interference

4.3.1 Electromagnetic Interference. It is desired that the system be immune to radio frequency

(RF) / Electromagnetic Interference (EMI). To control the electromagnetic emissions and susceptibility characteristics of the system, the installation of electrical/electronics subsystems and associated interface conform to the performance requirements for CE102, RE102 and RS103 of MIL STD461F for the Ground Navy installation.

4.4 Safety And Human Factors

4.4.1 Shock Hazards. It is desired that the system overall design incorporate methods to protect personnel from inadvertent contact with voltages capable of producing shock hazards.

4.4.2 Warning Labels. It is desired that permanent warning labels and/or indicators to warn of human hazards be provided on the system.

4.4.3 Controls/Displays. It is desired that the system have controls and displays that are easy to locate and understand.

4.4.4 Visual Indicators. It is desired that any visual indicators provided on the system be easy to read in all lighting conditions. If illumination is used as a method of displaying information, It is desired that the system have the capability to allow a user to temporarily disable all light emitting sources during black-out scenarios. Indicators should not depend on color perception to interpret.

4.4.5 Safety and Health Hazards. It is desired that the system not present major safety or health hazards while being operated, maintained or supported.

4.4.6 OSHA/EPA Requirements. It is desired that the system conform to all current

Occupational Safety and Health Administration (OSHA) and Environmental Protective

Agency (EPA) requirements.