The listing of all books and publications that are required to be maintained at an activity can be found in NAVMEDCOMINST 5600.1 and NAVMEDCOM- INST 6820.1. GSA periodically makes open-end contracts that cover the procurement of books. All professional books and publications are procured under the provisions of these contracts.

PURCHASES
Ships'supply officers and commanding officers of ships without Supply Corps officers may obtain supplies or services by purchase on the open market.

A.B. SMITH, LT, SC, USN
NOTE: DD FORM 1348-6 is a 6-part snap-out form with multicolored interleaved copies. It is perforated at fold line to permit folding to size of a requisition.

Figure 13-3.-Example of a Non-NSN Requisition (DD Form 1348-6).

Purchases are made by one of the following three methods:

1. Purchase order for purchases not in excess of $25,000 CONUS or $50,000 outside CONUS.

2. Imprest fund (funds authorized by TYPE commander for immediate purchases) for cash purchases of $500 or less.

3. Orders under indefinite delivery-type contracts and blanket purchase agreements (BPAs) that have been negotiated by shore activities.

A single requirement may NOT be divided with more than one purchase action for the purpose of avoiding monetary limitations. Procedures for purchases by ashore activities are provided in NAVSUPINST 4200.85.

Figure 13-4.-MILSTRIP requisition document: NAVSUP Form 1250-1.

Figure 13-5.-Requisition and Invoice/Shipping Document, DD Form 1149 (multiple requests). 384