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: [email protected]@onr.navy.mil