ment used during the navigation of the vessel. Dunnage shall be fitted to prevent packages contacting any metal part of the space used for this type of stowage.

§ 146.29-48 Ventilation of magazines. A magazine that is not fitted with ventilating ducts to the atmosphere shall be ventilated by omitting the top course of boarding on the sides of the magazine to provide a clear space at least 1 inch and not more than 6 inches below the lower flange or toe of the deck beam within the compartment or hold in which the magazine is constructed. Ventilators of system feeding directly into a magazine or a hold in which explosives are stowed shall be covered with a double layer of wire screen of not less than 8 x 8 mesh at the weather end of the cowl. This wire may be attached by folding it back along the cowl and securing the same in place by a sufficient serving with light line or wire to insure a positive closure.

§ 146.29-49 Authority to load; loading facilities and use. (a) (1) For the purpose of the regulations contained in this subpart, the explosives anchorages, explosives loading piers and ammunition loading piers which are authorized to be used in loading or unloading explosives are identified as follows:

(2) Explosives anchorages are those areas upon the navigable waters that are designated as areas within which a vessel may anchor or moor to receive or discharge cargo consisting of explosives.

(3) Explosives loading piers are those piers designated by a Captain of the Port to which a vessel may moor to receive or discharge cargo consisting of explosives.

(4) Ammunition loading piers are those piers designated by a Captain of the Port at which a vessel may moor to accept or discharge cargo consisting of military ammunition.

(b) Ammunition or explosives in bulk shall not be taken on board or unloaded from a vessel except at one of the authorized locations described in paragraph (a) of this section.

(c) A vessel shall not take on board as cargo or unload any class or type of ammunition or explosives in bulk at a facility described in paragraph (a) of this section unless the provisions of § 146.29-100 authorize the use of such facility for the handling of the class of ammunition or explosives in bulk involved.

(d) The handling and stowing of ammunition or explosives in bulk on board a vessel shall be in accordance with the applicable provisions of the regulations in this part.

(e) Explosives prohibited by subsection 3, of R.S. 4472, as amended, shall not be accepted by any vessel.

(f) A passenger vessel shall not accept any Class A explosives for transportation as cargo.

(g) A passenger vessel shall not accept for transportation as cargo the following Class B explosives: Ammunition for cannon with empty projectile, ammunition for cannon with sand-loaded projectile, ammunition for cannon with solid projectile, ammunition for cannon without projectile or smokeless powder.

(h) A vessel, subject to the regulations in this part, may load or discharge military explosives at any Navy or Army depot, arsenal, navy yard, port of embarkation or other facility under the direct control and operation of the Navy or Army; provided a permit authorizing such loading has been granted by the Captain of the Port. (See §§ 146.29-31 and 146.29-32.)

(i) [Reserved]

(j) In an emergency arising by reason of military necessity or casualty, a vessel may, upon authorization by a Captain of the Port, load or discharge military explosives in any location authorized by said Captain of the Port.

§ 146.29-50 Statements of characteristic properties and hazards. (a) In § 146.29-100 there are statements in italics setting forth certain characteristics and hazards of the substances or articles listed therein. It is not intended, nor shall it be assumed, that these statements set forth all of the characteristic properties or hazards of the particular substance or article and such statements as are shown are informative only.

(b) For the purpose of the regulations in this subpart Army Class XII explosives are treated as follows:

1. Ammonium nitrate is classified as an oxidizing material.

2. Dinitrotoluene (DNT) is classified as a high explosive Class IX.

3. Wet nitrocellulose wet with 20% of water is classified as an inflammable solid.

4. Wet nitrocellulose wet with 30% of alcohol or inflammable solvent is classified as an inflammable liquid.

§ 146.29-75 Stowage chart. The letter "X" at the intersection of a horizontal and a vertical column indicates that the particular class of military explosives shown by the heading of the horizontal column to the left may be stowed in the same hold or compartment with the particular class of military explosives indicated by the heading of the vertical column at the top of the chart. For specific provisions of stowage, and items included in each class, refer to § 146.29100.

NOTE A: Class II-F may be stowed in the same deep tank, lower hold or tween-deck hold with Classes II-C, II-E, II-G and III provided the Class II-F ammunition is bottom stowed and provided further that no other class of explosives or ammunition is stowed in a hold or tank directly below.

NOTE B: Class II-F may be stowed in the same deep tank, lower hold or tween-deck hold with Classes IV-A, IV-B, V and VII, provided the Class II-F ammunition is bottom stowed and provided further that no other class of explosives or ammunition is stowed in a hold or tank directly below.

NOTE C: Propellent charges Class II-B for separate loading artillery shell filled with Class XI-A or XI-B chemical may be stowed together in the same hold or compartment provided the propellent charges are "top stowed", the two items being separated by a type "A" dunnage floor. When so stowed the propellent charges shall not be overstowed with any other cargo.

NOTE D: Class II-J TH incendiary filled ammunition shall be stowed only in a deep tank or lower hold, and in all cases bottom stowed.

NOTE E: Classes V and VII (unfused) may be stowed with Class X.

820805-49-26

6. Remove damaged container and residue of powder to a safe location.

7. Gravity roller conveyor shall not be used unless authorized by the Captain of the Port in ports or facilities under his jurisdiction. At other ports or facilities authority for such use may be granted by the Officer in Charge.

8. Cargo handling stevedore gear may be trays, skipboards, pallets or pieplates provided they are fitted with cargo nets or sideboards. Boxes or trays with fixed or removable sides are authorized.

9. Cargo nets without trays, skipboards, pallets or pieplates are not permitted.

10. The maximum permitted weight per draft when handled by pallet, skipboard, tray or pieplate fitted with cargo net or sideboards shall not exceed 2400 lbs. plus 10%.

11. Drafts consisting of one or more palletized units shall not exceed 4000 lbs. plus 10%. 12. Lifts of palletized units shall not be tiered except when using a sling so designed as to prevent the upper tier or tiers from shifting or falling from the draft.

CLASS II-B

Smokeless powder propellents.

"Made-up bag charges" in outside shipping containers.

DESCRIPTION

Smokeless powder propellent charges (made-up charges) in cloth powder bags with igniter attached but without primer and packed in outside metal or fiberpack containers.

Includes but is not limited to

Propellent charges without primers, for separate loading ammunition such as: 4.5", 5"/50, 5''/51, 6''/47, 6''/50, 6''/53, 7", 8", 10", 12", 14", 15", 16", 155 mm., 240 mm.

I. C. C. MARKING

"Smokeless Powder for Cannon."

HAZARD

Loose powder may be ignited by spark, friction or intense heat.

Powder dust is especially hazardous.
Burns rapidly with excessive heat.

Burning powder in ship's hold may explode, producing structural damage and missiles.

May become unsafe if subjected to high temperatures.

If involved in a fire immediately apply water freely and in quantity.

STOWAGE

Ammunition stowage

When packed in metal tanks or in fiberpack containers with outside wood crate or when palletized.

Type "A" Magazine: Fiber-pack containers when shipped without outside wood crates and not palletized shall be stowed in a Type "A" magazine.

Fiber-pack containers without outside wood crates and stowed on their sides shall not be tiered more than 6 high.