CHAPTER I GENERAL

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PREPOSITIONED WATERCRAFT: PRESERVATION AND ACTIVATION PROCEDURES

TB-55-1900-231-15 Prepositioned Watercraft Preservation and Activation Procedures Manual

REFERENCES:

TB 55-1900-231-15

CHAPTER I

GENERAL

1. INTRODUCTION:

This procedure is prepared for organizations tasked to prepare watercraft for storage on-board a float on/float off

Heavy Lift Prepositioned Ship (HLPS) or Semisubmersible Barge (SSB). This procedure will be used for: Four (4)

each Landing Craft Utility (LCU) Design 1466A; Six (6) each Tug, Harbor, 100 Foot, Design 3006; Two (2) each

Crane, Floating, 100 Ton, Design 264-B; Twelve (12) each Landing Craft Mechanized, LCM-8, MOD I, and Two (2)

Reverse Osmosis Water Purification Barges (ROWPU).

A. Chapter II provides the tabulated data of watercraft designs identified in this HLPS storage procedure.

B. Chapter III details preservation requirements applicable to each identified watercraft.

C. Chapter IV details in-storage maintenance, (COSIS), requirements for watercraft processed for storage IAW this

procedure.

D. Chapter V details depreservation/activation requirements for all watercraft identified by design.

E. Chapter VI details represervation requirements after completion of activation and tests.

F. Appendix A, B, C, D, and E provides requirements by design for exterior sealing, dehumidification (D/H) zones,

location of D/H sensors and humidistats, air flow, routing of interior D/H flexible lines and the estimated volume

of air in each zone, Manhours by skill and material requirements to accomplish underwater hull protection,

preservation, COSIS, activation and represervation are also provided.

G. Appendix F gives instructions for the Surge Team Fueling Plan.

H. Appendix, MIL-S. 53021 contains the procedures governing the use of diesel fuel stabilizer additives for fuel

placed on stored watercraft.

2. CONCEPT:

This procedure was prepared to establish instructions for preservation and rapid activation of HLPS and SSB

stored watercraft. This procedure provides minimum sealing of exterior openings, contact preservation on

machinery and provides for dehumidification in machinery and habitable areas inside the watercraft.

A. Watercraft processed for storage in accordance with these procedures will be protected from corrosion and

deterioration for a period of 24 months.

B. The concept of these procedures provides for activation within two (2) days.

C. Each HLPS and SSB watercraft will be activated, tested, repaired and represerved as prescribed by Third U.S.

Army.

D. Dehumidification (D/H) machines, four (4) inch PVC D/H piping, sensing elements and humidistats will be

provided and installed by the Military Sealift Command (MSC) contractor. The D/H external piping (PVC) will be

installed between the D/H Machines and the four (4) inch PVC hull (coupling) penetration previously installed

during preservation HLPS Watercraft shall have a sufficient quantity of D/H machines to dehumidify a total

estimated 428,000 cubic feet of air. The run time on any D/H machine should not exceed 50 percent during at

two (2) week period. SSB Watercraft will have sufficient quantity of D/H machines to dehumidify a total

estimated 128,400 cubic feet of air. The sensing