SPACE LAYOUT FACTORS

The detailed stowage layout should be arranged to allow for maximum stowage capacity, access to all stores, orderly arrangement, and security/safety of stores. Essential items should be dispersed in stowage among the various sections of the ship to reduce the effects of battle damage to particular parts of the ship. Material that is bulky, fragile, perishable, flammable, susceptible to damage by heat or moisture, or that

possesses any other physical characteristics that affect the safety of the ship or personnel should be given primary consideration in the layout of stowage plans,

Material should be stowed in spaces as near as practical to where the items are to be used. Heavy bulk items should be located so that a minimum of handling is required. Items that must be handled by personnel should be placed to minimize the risk of injury when lifting. Where MHE cannot be used, items should be broken down into units that can be safely lifted by one or two individuals. Storerooms serviced directly by ship's hatches and cranes receive first consideration for purposes of bulk stowage. Special racks may be installed on the hangar deck for stowage of fuel drop tanks, helo blades, and so on. Hangar deck and gun

sponson spaces may be allocated for the stowage of aircraft engines, catapult seals, arresting gear cables, buddy stores, and so on. Other factors to consider are as follows:

Locate light, bulky material in storerooms with a high overhead clearance (to maximim the use of available space).

Segregate materials that are similar in type or classification (for example, hazardous/ nonhazardous, large/small, shelf-life/nonshelflife).

Locate frequently requested material as close as possible to the point of issue and in storerooms that are most convenient to maintenance personnel.

Locate shelf-life items in a readily accessible area to facilitate periodic screening.

Install appropriate stowage aids in spaces in which they can be effectively used.

Provide for aisles that are at least 30-inches wide between bins, racks, and/or cabinets.

Arrange materials with identification labels facing outward to facilitate issue and inventory.

Place hazardous materials in designated storage areas, segregated by compatibility and hazard.

Avoid, as much as possible, multiple locations for the same item.

MATERIAL IDENTIFICATION

Storeroom custodians should make sure that all items in stowage are legibly marked, tagged, or labeled with a stock number, Navy Item Control Number (NICN), or other appropriate identification markings. When necessary, technical assistance from other departments may be requested to determine proper identification of unmarked or illegibly marked materials. Items that cannot be identified must be turned in ashore for disposition.

Hazardous materials that are missing labels or are not properly labeled with the name of the material, hazard of the material, and name and address of the manufacturer, should be refused receipt. Containers of hazardous material obtained through open purchase should be accepted only if they contain a manufacturer's label with the name of the material, hazard of the material, and name and address of the manufacturer. The afloat or base Hazardous Material Coordinator will be contacted if any hazardous materials in storage are discovered to be lacking proper labeling.

MATERIAL PROTECTION LEVELS

Material procured for the Navy is provided the degree of preservation, packaging, and packing specified by the cognizant inventory manager to the extent necessary to protect the material from deterioration and damage during shipment, handling, and stowage. For definitions of specified protection levels and descriptions of codes marked on unit packages and exterior shipping containers, you should refer to Supply Afloat Packaging Procedures, NAVSUP P-484. You should also refer to this publication to determine adequate protection of ready for issue (RFI) materials and unserviceable mandatory turn-in repairable to be transferred to another activity.

STOWAGE LOCATION SYSTEM

The general storeroom layout is basically the same on each ship; that is, the storerooms are numbered or lettered in sequence beginning with storeroom forward on the starboard side, and progresses from starboard to port, upper level to lower level, and bow to stem. The locations within a storeroom are generally numbered with the numbering system being uniform in all stowage spaces.

The location of each item in stock will be maintained on tape in the Shipboard Uniform Automated Processing System (SUADPS) master record file (MRF) and printed as part of the master stock status and locator listing (MSSLL). The maximum number of locations for one item listed in the MSSLL is four. Each location will be designated by a five-character alphanumeric number (for example, Al 238), except when the configuration of the storage area or physical characteristics of the material dictate an alternate system. Instructions applicable to records for stock material located in other departmental spaces can be found in chapter 6 of Afloat Supply Procedures, NAVSUP P-485.

STOWAGE AIDS

Consistent with the stowage criteria and layout ^{factors, storerooms} are outfitted with bins, racks, shelving, lockers, drawer cabinets, deck grating, battens, and or other stowage aids best suited for the types and quantities of material to be stowed. Refer to chapter 4 of NAVSUP P-485 for illustrations of different types of stowage aids used afloat. When stowage aids need to be modified or relocated, or when additional aids must be manufactured by a repair ship

or shipyard, an appropriate work request must be submitted using the Ships' Maintenance and Material Management (3-M) Manual, OPNAVINST 4790.4.

HAZARDOUS MATERIAL STORAGE

Certain materials with inherent hazardous properties require special stowage facilities and handling precautions. Afloat hazardous material stowage is more restrictive than shore requirements for damage control purposes. Storage requirements for each type of material are provided in OPNAVINST 5100.19, chapters C23 and D15, on the Material Safety Data Sheet (MSDS), and in NAVSUP Publication 573.

MSDSs are available on the Hazardous Material Information System (HMIS), which replaced the Consolidated Hazardous Item List (CHIL). The HMIS is distributed on compact disk-read only memory (CD-ROM) format only. The HMIS in compact disk (CD) format contains both the DOD 6050.5L and DOD 6050.5LR. The CD format is issued quarterly. Each issue contains updates in its entirety.

The HMIS provides the users the information needed to properly manage hazardous materials. 'The system provides Material Safety Data Sheets (MSDSs) for standard stock numbered items, and a wide range of information concerning safety, health, packaging, and labeling. The HMIS gives a Hazard Characteristic Code (HCC) for each item, which defines the storage requirements. The HMIS also lists the transportation information and disposal code for each item. The disposal code indicates the pretreatment method and ultimate disposal action prescribed for spilled, spoiled, or other waste quantities of the item to which it applies. The HMIS does not contain information for items procured through open purchase.

The Ships Hazardous Material List (SHML) is a record of the hazardous material (HM) carried aboard U.S. Navy ships for which there exists a valid requirement. The SHML provides ships with the capability of determining which hazardous materials are authorized for shipboard use to preclude stocking of materials for which the ship has no use. Materials which do not appear on the SHML should be suspect of being in excess and should not be ordered. A SHML Feedback Report can be submitted to add items to the SHML if a valid requirement exists. Quantities of materials are not provided in the SHML, nor is the SHML to be used as specific to a ship or ship class. The SHML is a list of HM that any ship with a valid need is authorized to have on board. The Material Safety Data

Sheet (MSDS) in the HMIS will state in the first section whether or not the item is authorized by the SHML.

NOTE: The SHML in CD format has been incorporated into the Hazardous Material Control and Management Program (HMC&M). The HMC&M in CD format contains the SHML, HMIS, and Hazardous Material User's Guide (I-MUG).

To report SHML inconsistencies or new products, use the feedback report, NAVSUP Form 1400. This form is included in the SHML on the CD and an example is illustrated in chapter 2 of NAVSUP P-485.

If the item to be reported has an assigned national stock number (NSN) and application data, but not listed in SHML, submit the report directly to Naval Inventory Control Point-Mechanicsburg (NAVICP-MECH). This type of report does not require the commanding officer's (CO's) approval. Send an info copy of the report to the applicable type commander (TYCOM).

The report for items that do not have assigned NSNS or application data and not listed in the SHML will require the CO's approval. The report must be signed by the CO and submitted to NAVICP-MECH via the TYCOM.

When procuring nonstandard HM, the request must include a copy of the approved SHML Feedback Report. The approved report will serve as required certification to procure the nonstandard HM that is not listed in the SHML.