MOBILE OFFSHORE BASEMOBILE OFFSHORE BASE (MOB) (MOB)

ONR S&T ProgramONR S&T Program

OverviewOverview

Office of Naval ResearchOffice of Naval Research

ONR MOB S&T ProgramONR MOB S&T Program

Follows DARPA Program (1993-1996)Follows DARPA Program (1993-1996)

ONR S&T Program (1997-2000)ONR S&T Program (1997-2000)

ObjectiveObjective:: EstablishEstablish FeasibilityFeasibility and and CostCost of MOBof MOB

Approach:Approach:Open, Collaborative Teaming amongOpen, Collaborative Teaming among

Industry, Academia, and GovernmentIndustry, Academia, and GovernmentData and Technical Documents immediately Data and Technical Documents immediately

available on the WEB available on the WEB **

* http://mob.nfesc.navy.mil* http://mob.nfesc.navy.mil

MOBMOB General MissionGeneral Mission

Provide a floating, in-theater platform Provide a floating, in-theater platform for U.S. and Allied Forces for for U.S. and Allied Forces for operational and sustainment basing operational and sustainment basing capabilities in support of:capabilities in support of:

» Flight OperationsFlight Operations» Ground TroopsGround Troops» Equipment StorageEquipment Storage» Supply & MaintenanceSupply & Maintenance» Fleet OperationsFleet Operations

A Unique Ocean Mega-StructureA Unique Ocean Mega-Structure

•40 year life

•Reconfigurable versus mission

•Support fixed wing cargo aircraft operations up to SS6

•Large volume required for storage

•Support a full Army

Brigade

•Ship-to-ship cargo transfer up to SS3

•Exceeds Industry Practice

•Survivable in hurricanes and

typhoons

and equipment maintenance

Semi-submersible

VLCC

CVN

M O B

300m (DB102)

455m (Seawise Giant)

320m (Nimitz)

Semisubmersible Modules300-600m length130-160m beam

13-35m draft

MOB Module & Platform SizeMOB Module & Platform Size

Platform Configuration300-1800m length

1 to 5 modulesRigid/Hinged/Bridged/DP Connectivity

Concept ConfigurationsConcept Configurations

Two ModulesSingle Module

Hinged Platform

Bridged Platform

Dyn. Pos. Platform

MOB Topics Related to JLOTSMOB Topics Related to JLOTS

Requirements DerivationRequirements Derivation

Operational Availability ModelingOperational Availability Modeling

Cargo TransferCargo Transfer

ConstructabilityConstructability

Requirements Derivation ProcessRequirements Derivation Process

Mission Needs Statement (MNS)

CONOPS

MissionAnalysis

RequirementAnalysis

FunctionalAnalysis

Synthesis & Concepts

EngineeringDesign Criteria

Requirements

FunctionsFunctional

RequirementsDATABASE

Functional Requirements

DATABASE

Broadly StatedBroadly StatedObjectivesObjectivesDecomposed into Decomposed into Specific Specific Engineering Engineering Design Design RequirementsRequirements

Requirements Derivation ProcessRequirements Derivation Process Documented in Database StructureDocumented in Database Structure

S pecia l O perations F orce(S O F )

O M F TS

C onduct A rriva l/Assem b lyO ps at S ea

R e-C onstitu tein-Theatre

P rov ide H ote lS erv ice toE m barkedP ersonnel

C onveyV ehicu lar

C arg o to /fromR O /R O D ecks

O ffload B ulkL iqu ids

Locate, Identify& Track

all C argo

Ventilation Systemw ith 10 Changes/Hrfor Vehicle Decks

Clear Deck Height of15.5 ft for Vehicle Decks

and T ransit Routes

Vehicle Decks toW ithstand Uniform Loads

of 550 PSF

FunctionalRequirem ent 4

FunctionalRequirem ent 5

Functional... Requirem ent n

S tow V ehicu larC arg o

C apab ility 6 ... C apab ility n

R einforce A m phib iousTask F orce

M iss ion E lem ent 4 ... M iss ion E lem ent n

M O B as Log is ticsH ub

TA C A IR

MOBILE OFFSHORE BASE.

Contents of Requirements Database

(MNS)

(CONOPS)

(SCD)

Notional MOB System Capabilities to Support - Notional MOB System Capabilities to Support - Operational Maneuver From The Sea (OMFTS)Operational Maneuver From The Sea (OMFTS)

Supply and SustainmentSupply and SustainmentReceive, store, issue, and re-Receive, store, issue, and re-supply material for MAGTF supply material for MAGTF operations for 60 days, operations for 60 days, Interface with Strategic Sea-Interface with Strategic Sea-lift and Air-Liftlift and Air-Lift

MaintenanceMaintenanceI-Level for all MAGTF I-Level for all MAGTF Aircraft, Vehicles and Aircraft, Vehicles and Combatant CraftCombatant Craft

C4IC4IControl MAGTF throughout Control MAGTF throughout Area of Operation (AO), Area of Operation (AO), Coordinate with CJTF Coordinate with CJTF supporting forcessupporting forces

Health Service SupportHealth Service SupportRoutine and emergency medical Routine and emergency medical carecare

OtherOtherAdministrative and personnel Administrative and personnel support to keep combat forces support to keep combat forces fully operationalfully operational

EXAMPLE

Major Mission Specific CapabilitiesMajor Mission Specific Capabilities

SOFSOF

Up to 10,000 SOF Up to 10,000 SOF personnelpersonnel

74 Rotary/Fixed-74 Rotary/Fixed-wing aircraft, 22 wing aircraft, 22 combatant craftcombatant craft

Water Water

– 6 Million Liters6 Million Liters Fuel & Dry Cargo Fuel & Dry Cargo

for SOF equipmentfor SOF equipment

– 40.5 Million 40.5 Million LitersLiters

– 9,700 Metric 9,700 Metric Tons CargoTons Cargo

Logistics (CVBG)Logistics (CVBG)

DailyDaily Cargo Through- Cargo Through-put in support put in support per per CVBGCVBG

– Provision/StoreProvision/Store

» 24 Metric Tons24 Metric Tons

– DFM DFM

» 580,000 Liters580,000 Liters

– JP5JP5

» 1 Million Liters1 Million Liters

– OrdnanceOrdnance

» 150 Metric Tons150 Metric Tons

OMFTSOMFTS

Up to 20,000 MAGTF Up to 20,000 MAGTF personnelpersonnel

128 Rotary/Fixed-wing 128 Rotary/Fixed-wing aircraft, 62 lighterageaircraft, 62 lighterage

Strategic Sealift and Strategic Sealift and Airlift (C-17 capable)Airlift (C-17 capable)

Water Water – 24 Million Liters24 Million Liters

Fuel & Dry Cargo for Fuel & Dry Cargo for MAGTF equipmentMAGTF equipment– 67.5 Million Liters67.5 Million Liters– 16,200 Metric Tons 16,200 Metric Tons

CargoCargoEXAMPLE

Mob Size & Cost RangesMob Size & Cost RangesMob Size & Cost RangesMob Size & Cost Ranges

ACCEPTABLEACCEPTABLE

C-130 CapabilityC-130 Capability

SOFSOF

OMFTSOMFTS

LOGISTICSLOGISTICS

OPERATIONAL BASEOPERATIONAL BASE

$1.5B$1.5B

$2-3.0B$2-3.0B

$4-5.0B

3,0002,0002,0001,0001,000 6,0004,000 5,000

$2-3.0B$2-3.0B

C-17 CapabilityC-17 Capability $8.0B

PENDING COMPLETION OFPENDING COMPLETION OF S&TS&T

PLATFORM LENGTH (FT)PLATFORM LENGTH (FT)

RISK:RISK:

OnsiteOps

OnsiteOps

Transit

Transit

Transit

Connect +Onsite Ops

OnsiteOps

Operational Availability ModelOperational Availability Model

Assess the performance Assess the performance of any MOB concept of any MOB concept relative to the Mission relative to the Mission Needs Statement Needs Statement

Investigate the Investigate the sensitivity of various sensitivity of various performance performance parameters to changes parameters to changes in Concept in Concept Configuration and Configuration and Mission RequirementsMission Requirements

Status: Status: – Preliminary model - Sept. 98Preliminary model - Sept. 98– Generalized model & Report Generalized model & Report

Dec. 99Dec. 99– Input Data files - Feb. 00Input Data files - Feb. 00

Module

Module #1

Check MOB

Transit

Mod1 Transit

OnSite

Mod1 OnSite

Module

Module #2

Inter-Module

Inter-Module #1

Apply Variables

Transit

Mod2 Transit

MOB Configuration

OnSite

Mod2 OnSite

Operation Thresholds

MOB Hardware and Behavior Properties

OPERATIONAL AVAILABILITY ASSESSMENT MODEL FOR

MOBILE OFFSHORE BASES (MOBs)

MOB Mission Profile

Module

Module #3

Inter-Module

Inter-Module #2

Transit

Mod3 Transit

OnSite

Mod3 OnSite

Full MOB OnSite

MOB OnSite

Full MOB Transit

MOB Transit

What is Ao?What is Ao?

LogisticsDelayTime

RepairTime

Available TimeTime

Available TimeTotal Time

Ao =

“Failed” “Repaired” “Failed”

Reliability Available Time

Maintainability Repair Time

Supportability Logistics Delay Time

Operational Availability (Ao) ModelOperational Availability (Ao) Model

Large-scale

Typhoon scale

Wind/wave/currentDatabases

• Quantify performance versusQuantify performance versus

– Platform configuration,Platform configuration,– Metocean characteristics of various sites, Metocean characteristics of various sites, – Mission RequirementsMission Requirements

OnsiteOps

OnsiteOps

Transit

Transit

Transit

Connect +Onsite Ops

OnsiteOps

Preliminary Ao Statistics - Preliminary Ao Statistics - Site ComparisonSite Comparison

Site Capability Ao MTBF MTTRNorth Atlantic Air Ops 0.9662 343.1 12.0

Sea Ops 0.5131 73.2 70.0Stationkpg 0.9986 1086.0 1.5

Western Pacific Air Ops 0.9903 957.3 9.4Sea Ops 0.8676 296.0 45.2Stationkpg 0.9975 1239.8 3.1

Arabian Sea Air Ops 0.9993 1580.7 1.1Sea Ops 0.9048 715.6 75.3Stationkpg 0.9993 1580.7 1.1

Sea of Japan Air Ops 0.9966 912.7 3.1Sea Ops 0.9476 402.1 22.2Stationkpg 0.9987 1086.7 1.4

(Hours)

Ship Cargo Transfer Rate ModelShip Cargo Transfer Rate Model

Create an Create an analytically robust analytically robust method to estimate method to estimate cargo transfer rate cargo transfer rate between MOB and between MOB and auxiliary vessels auxiliary vessels under variety of under variety of environmental environmental conditionsconditions

StatusStatus– Preliminary Model and Interem Report delivered - Preliminary Model and Interem Report delivered -

March 99March 99

– Ship Motion analysis Ship Motion analysis

completed - Aug 99completed - Aug 99

– Final Model and Report Final Model and Report

due March 00due March 00

Overall Modeling StrategyOverall Modeling Strategy

Vessel Vessel ResponseResponse

EnvironmentEnvironment

Motion Motion CalcsCalcs

Cargo Xfer Cargo Xfer MethodMethod

Cargo Cargo DescriptionDescription

Cargo Cargo Movement Movement

PlansPlans

Transfer Transfer SimulationSimulation

RateRate

--------------------------

Xfer Xfer ScheduleSchedule

--------------------------

Container Movement StepsContainer Movement Steps

Movement Steps 1. Lift to travel position 2. Move to target 3. Focus on target* Insert in Cell Guide* Lower in Cell Guide*

1

2

35

4

67

8

MOBMOB

Robo CraneRobo Crane

9

4. Latch Lift in Cell Guide* 5. Lift to travel position 6. Move to unload

7. Drop to unload 8. Unlatch 9. Store on MOB ( *Gated operation )

Cargo Transfer Rate Model ConclusionsCargo Transfer Rate Model Conclusions

Simulation works as tool for determining transfer Simulation works as tool for determining transfer raterate

Preliminary resultsPreliminary results– Expect about 29 containers / hr as maximum transfer rate Expect about 29 containers / hr as maximum transfer rate

on MOBon MOB

– Motion compensated crane design is likely choice for Motion compensated crane design is likely choice for MOB, with manual backup capabilityMOB, with manual backup capability

– Capability of crane designs to acquire target should be Capability of crane designs to acquire target should be focus of crane-testing programsfocus of crane-testing programs

Model needs to be calibrated from field test dataModel needs to be calibrated from field test data

Cargo Transfer to Landing CraftCargo Transfer to Landing Craft

Products:Products: wave characterization wave characterization

around MOBaround MOB wave sheltering wave sheltering

conceptsconcepts

Issues:Issues: size of MOB allows for unique open size of MOB allows for unique open

sea cargo conceptssea cargo concepts MOB does not move -goodMOB does not move -good large hull amplifies waves - badlarge hull amplifies waves - bad physics of vessel to vessel interaction physics of vessel to vessel interaction

poorly understoodpoorly understood unique berthing requirementsunique berthing requirements

Focus:Focus: Assess ability to Assess ability to transfer cargo to small transfer cargo to small landing craft alongside landing craft alongside MOBMOB

Vertical wall sheltering

Typical Relative Water Surface Contour PlotTypical Relative Water Surface Contour PlotBase Case – 6 Second Waves - 30Base Case – 6 Second Waves - 30 Heading Heading

Comparison of RMS Ramp Angle Comparison of RMS Ramp Angle (Heading With Lowest Motions)(Heading With Lowest Motions)

Peak Period (sec) Base Case

Location 4, 20

Vertical Walls

Location 4, 70

6 2.57 1.54

8 3.82 1.90

10 4.46 2.36

Transmission Coeff Is Misleading - Must Calculate Vessel Motions

ConstructabilityConstructability

Concluded that U.S. industry has capacity to Concluded that U.S. industry has capacity to competitively deliver a CTOL-length MOB competitively deliver a CTOL-length MOB platformplatform

• Developed a risk-based constructability model and Developed a risk-based constructability model and guidelinesguidelines

– facility capabilitiesfacility capabilities– transportationtransportation– environmental impactenvironmental impact– safetysafety– managementmanagement– cost and schedulingcost and scheduling

MOB Program SummaryMOB Program Summary

Pioneering marine technology advancementsPioneering marine technology advancements

Products emphasize general applicability, Products emphasize general applicability, ranging from mission planning to fabrication ranging from mission planning to fabrication

Advancements also applicable to other Advancements also applicable to other maritime structures and Navy programsmaritime structures and Navy programs

Some S&T unfinished due to short 3-year Some S&T unfinished due to short 3-year project durationproject duration

For More InformationFor More Information

Visit the MOB WEB Site: Visit the MOB WEB Site: http://mob.nfesc.navy.milhttp://mob.nfesc.navy.mil

E-Mail the Program Office: E-Mail the Program Office: taylorrj@onr.navy.miltaylorrj@onr.navy.mil