Underway Replenishment (UNREP) Technical and Operational Procedures

Comprehensive vocabulary flashcards covering Underway Replenishment (UNREP) standards, hardware specifications, flag signals, rig dimensions, and safety procedures from NSTM 571 and NTTP 4-01.4.

STREAM

An acronym for Standard Tensioned Replenishment Alongside Method, which allows ships to maintain a separation of $140-180\,\text{feet}$ during replenishment.

SURF

Standard Underway Replenishment Fixture.

STAR

SURF Traveling Actuated Remotely; a rig where the latch assembly and probe engage automatically when passed to the receiving station and unlatch remotely when retrieved.

Types of UNREP

The two primary methods of underway replenishment: Connected Replenishment (CONREP) and Vertical Replenishment (VERTREP).

F-76 and F-44

NATO fuel designations corresponding to DFM (Diesel Fuel Marine) and JP-5, respectively.

UNREP Station Markers

Color-coded visual identifiers marking specific liquid transfer stations: red for DFM, blue for potable water, and yellow for JP-5.

Fuel Probe Seating and Unseating Forces

Mechanical force thresholds requiring $300\,\text{LBS}$ to seat the fuel probe and $2500\,\text{LBS}\;(\pm 500\,\text{LBS})$ to unseat it.

Probe Indicator Flags

Visual indicator flags on the fueling receiver that pop up to a $30\,\text{degree}$ angle when the probe is properly seated.

Fuel Hose Diameters

Standard hose sizes utilized during fueling: $7\,\text{in}$ diameter for DFM and $2\frac{1}{2}\,\text{in}$ diameter for JP-5.

Standard Collapsible Fueling Hose

A flexible fueling hose that measures $35\,\text{feet}$ in length.

Type "A" Flow-Through Saddle

A $19\,\text{in}$ long saddle used to support the $7\,\text{in}$ fuel hose.

Type "B" Flow-Through Saddle

A $32\,\text{in}$ long saddle used to support the $2.5\,\text{in}$ fuel hose.

Delivery Stations (Carriers and Large Amphibious Ships)

Fuel delivery stations located on the starboard (STBD) side of carriers and large amphibious ships, operating at transfer speeds of $12-16\,\text{knots}$.

Single Rig Wire Rope

A spanwire with a diameter of $\frac{3}{4}\,\text{in}$ and a length of $900\,\text{ft}$.

Double Probe Wire Rope

A spanwire with a diameter of $\frac{7}{8}\,\text{in}$ and a length of $900\,\text{ft}$.

Saddle Whips

Whips used to adjust and support fuel hose saddles, measuring $450\,\text{ft}$ in length.

UNREP Messenger

The main line used to haul rigs across ships, measuring $800\,\text{ft}$ in length.

Remating Line

A line measuring $60\,\text{ft}$ in length used during probe unrep operations.

Easing-Out Line

A line constructed from 12 to 21 thread manila line used to ease out fittings and equipment under tension.

Long Strap

A $42\,\text{in}$ strap fitted with a steel safety snap hook at each end, used when the messenger has a twist.

Short Strap

An $18\,\text{in}$ strap with a steel safety snap hook at each end, used for a double probe when disconnecting the messenger and hooking up the remating line.

Robb Coupling

A liquid transfer coupling used for fueling connections when a standard probe is not available.

D-2 Nozzle

A specialized nozzle utilized for a standard fuel coupling on all $2\frac{1}{2}\,\text{in}$ hoses.

Spanwire-to-Messenger Tie-Off

Secured using 2 stops attached at $350\,\text{ft}$ from the inboard end of the messenger (tied with a square knot on top, 3 twists, and a clove hitch with one additional inside turn on each strand), which are cut outboard first, then inboard.

Shot Line Procedures

Fired by the delivery ship (unless the receiving ship has aircraft onboard) after the receiving ship gives 2 blasts on a whistle; the bridge-to-bridge phone line is the first item sent across.

Emergency Breakaway

An accelerated breakaway following standard procedures initiated without requiring permission from the bridge to detension the rig; signaled by 5 short blasts from the ship's whistle.

Phone and Distance (P&D) Line

A $350\,\text{ft}$, 3-strand polypropylene line with flags spaced every $20\,\text{ft}$ from $0-300\,\text{ft}$, with the zero flag held by the delivery ship $10\,\text{ft}$ from the phone box.

P&D Line Flags

Markers measuring $8 \times 10\,\text{in}$ following the color sequence green, red, yellow, blue, white, green, with $5\,\text{in}$ high numerals colored white on red/blue, yellow on green, green on yellow, and blue on white.

P&D Line Chemical Lights

Two blue chem lights attached to the $60$, $100$, $140$, and $180\,\text{ft}$ markers (one on each side), and one red chem light on all other markers closest to the approach ship.

Pelican Hook (Probe UNREP)

A $1\frac{3}{8}\,\text{in}$ quick-release hook used to secure the spanwire during probe replenishment.

Birdbox

A signal lighting enclosure containing 2 light bulbs rated at $25\,\text{watts}$ each.

Lead Line Weight

A sounding/heaving lead weight that weighs between $7-14\,\text{LBS}$.

UNREP Station Hardhat Color Codes

Specific roles designated by color: Safety (white), Rig Captain (yellow), Riggers (blue), Winch Operator (brown), Signalman/Phone Talker (green), Line Handlers (kapok), and Medical (white with red cross).

Signal Paddles

Visual signaling paddles measuring $12 \times 12\,\text{in}$, with the green paddle displaying a $1\,\text{in}$ wide white stripe for color-blind personnel.

Receiving Station Static-Load Ratings

Test limits for fittings: Spanwire attachment point ($36{,}000\,\text{LBS}$), Riding line padeye/cleat ($15{,}000\,\text{LBS}$), Jigger tackle padeye ($12{,}000\,\text{LBS}$), Messenger padeye ($9{,}000\,\text{LBS}$), Jigger tackle cleat ($3{,}000\,\text{LBS}$), Easing-out line fittings ($2{,}700\,\text{LBS}$), and Probe stowage tiedown fittings ($600\,\text{LBS}$).

Wire Preventer

A $\frac{1}{2}\,\text{in}$ diameter wire safety backup secured by a $\frac{5}{8}\,\text{in}$ shackle to a transfer chair or litter ($2\,\text{ft}$ long for highline, $4\,\text{ft}$ long for cargo drop reel) in case the primary attachment fails.

Synthetic Highline (Personnel Transfer)

A $4\,\text{in}$ double-braid polyester line of at least $350\,\text{ft}$ provided by the delivery ship, with a safe working load of $600\,\text{lbs}$; wire rope is strictly prohibited.

Personnel Transfer Line Handling Crews

The minimum manning requirement of 25 personnel to tend the synthetic highline and 10 personnel to tend the inhaul or outhaul lines.

Inhaul and Outhaul Lines (Personnel Transfer)

The outhaul line is tended by the receiving ship; the inhaul line is a $3\,\text{in}$ plaited polyester line (minimum $350\,\text{ft}$) connected to the trolley with a $\frac{7}{8}\,\text{in}$ or $\frac{3}{4}\,\text{in}$ safety anchor shackle.

Highline Safety Anchor Shackle

A $1\,\text{in}$ safety anchor shackle used to secure the synthetic highline to the receiving ship's attachment point.

Conveyance Tag Lines

Lines used to steady transfer equipment during transit, measuring $6\,\text{ft}$ on the transfer chair and $12\,\text{ft}$ on the transfer litter.

Fairlead Block Safety Distance

A mandatory safety perimeter requiring all line handlers to stand at least $6\,\text{ft}$ away from fairlead blocks.

Immersion Suit UNREP Criteria

Protective gear required to be worn by personnel transferred across rigs when the water temperature is $45\,\text{degrees}$ or below.

Flag ROMEO

Replenishment flag: At the dip indicates ready to come alongside ($300\text{ to }500\,\text{yards}$), close-up indicates commencing approach, and hauled down when the first messenger is in hand.

Flag PREP

Disengagement flag: At the dip indicates 15 minutes prior to disengagement (receiving ship only), close-up indicates replenishment complete and last station disengaging, and hauled down when all lines are clear.

Gull Wing

A cargo handling fixture equipped with 3 hooks and certified for a maximum lift capacity of $10{,}000\,\text{lbs}$.

Anti-Slack Device

A mechanism that maintains constant tension on the highline to prevent wire rope on the winch drum from slacking during rigging operations.

Ram Tensioner

A large hydraulic cylinder coupled with an air/oil accumulator that automatically adjusts wire tension for ship roll and variations in hull separation.

Cargo Drop Reel

A lowering mechanism on a tensioned highline with a safe working load of $5{,}700\,\text{LBS}$ requiring $50\,\text{LBS}$ of pull to release the brake, used with fixed padeye, pendant, or support leg stations.

STREAM Receiving Stations

The four standard configurations for STREAM rigs: sliding padeye (tested statically to $50{,}000\,\text{LBS}$), fixed padeye, pendant, and STREAM support leg (CVN only).

Transfer Bags (Mail and Material)

Containers used during transfer: weighted bags for classified material and registered mail to ensure sinking if lost; flotation bags for nonregistered mail and movies to prevent sinking.