Commercial vessel operators, marine port engineers, and shipyard managers face critical structural mandates: tracking underwater hull thickness, monitoring sacrificial anode depletion, and coordinating complex statutory drydocking intervals across dispersed maritime fleets. When ultrasonic thickness gauging (UTG) reports, sea chest valve overhauls, and drydock defect work scopes live across paper binders and disjointed spreadsheets, shoreside teams lose visibility and vessels risk catastrophic structural failures or Class survey non-compliance detentions. Fleet Rabbit provides specialized commercial vessel hull inspection and drydock-scheduling software, combining digital plate gauging records, automated statutory drydock interval alerts, and running-hour planned maintenance into one centralized marine platform. Achieve 100% Class survey readiness, eliminate manual drydock scope compilation, and capture complete structural inspection records offline even when operating in deep-water transit or offshore berths. Book a Demo to see Fleet Rabbit hull inspection workflows in action.
100%
Class and statutory drydock survey schedule compliance maintained across all vessels
35%
Reduction in unexpected shipyard drydock overruns and structural steel change orders
0
Survey deficiencies on bottom plating, sea valves, rudder clearances, and tailshafts
8 hrs
Weekly administrative time saved per port engineer compiling drydock repair work scopes
Drydock Periods Should Be Planned with Precision, Not Surprises. Fleet Rabbit Keeps Your Hull Survey-Ready.
Fleet Rabbit centralizes ultrasonic plate thickness gauging, cathodic protection logs, sea chest valve overhauls, and shipyard work packages into one unified dashboard. Pre-built templates for underwater hull surveys, rudder pintle clearances, and tailshaft wear-down ensure zero-configuration maritime compliance.
Why Generic Maintenance Software Fails Marine Hull & Drydock Management
Standard fleet maintenance tools track routine oil changes and road vehicles, but commercial hulls require dedicated naval architecture workflows, underwater gauging ledgers, and Class drydocking interval management.
Disconnected Hull Thickness Records
Ultrasonic thickness gauging (UTG) reports and plate diminution records stored across physical PDF files make it difficult for port engineers to project steel renewal needs before shipyard haul-out.
Lapsed Special Survey & Haul-Out Deadlines
Spreadsheets lack dynamic alerting for 2.5-year intermediate and 5-year special drydock survey windows, risking immediate suspension of Class certificates and charter party breaches.
Fragmented Sea Valve & Anode Tracking
Sea chest strainer cleaning, cathodic protection zinc depletion, and tailshaft poker gauge readings live across scattered logbooks, leading to unexpected corrosion and shaft seal failures.
Offshore Communication Gaps
Cloud-only software freezes when vessels operate outside cellular connectivity, preventing shipboard engineers from logging daily void space soundings, ballast tank inspections, or hull defect notes at sea.
How Fleet Rabbit Powers Vessel Hull Inspections & Drydock Scheduling
Fleet Rabbit equips port engineers and chief engineers with specialized hull inspection ledgers, UWILD checklists, and automated drydocking interval trackers. See a live demo tailored to your hull and drydock workflows.
Digital Hull & Ballast Tank Checklists
Standardized mobile inspection forms for ballast tanks, void spaces, chain lockers, antifouling coating condition, and sacrificial anode wastage percentages.
Drydocking & UWILD Schedule Automation
Dynamic 180, 90, and 30-day alerts for intermediate drydock exams, Underwater Inspection in Lieu of Drydocking (UWILD), and 5-year special surveys.
Plate Gauging & Steel Diminution Tracking
Log ultrasonic thickness readings against specific hull frames and strake plates to visualize wear patterns and forecast required shipyard steel renewals.
Full Offshore Offline Mode with Auto-Sync
Engineers complete internal tank inspections, take structural photos, and log sounding records offline at sea; records sync automatically upon reaching shore signal.
Integrated Shipyard Work Scope Builder
Convert accumulated hull defects, valve overhauls, and running-hour overhaul items directly into a structured, exportable drydock specification package for shipyard bidding.
1-Click Class Society & USCG Audit Exports
Generate comprehensive structural history logs, sea valve pressure test certificates, and rudder clearance records in seconds during official survey boardings.
Built for Classification Societies & Maritime Statutory Standards
Fleet Rabbit’s hull inspection workflows and drydock schedules are structured to satisfy mandatory statutory requirements across major international classification bodies and maritime authorities.
USCG Subchapter M & OCMI
Supports statutory drydock exam records, internal structural examination (ISE) logging, and underwater survey documentation aligned with 46 CFR Subchapter M and Coast Guard OCMI mandates.
Class Societies (IACS)
Structures hull thickness gauging and bottom survey records to comply with ABS, DNV, Lloyd's Register, and Bureau Veritas Continuous Hull Survey and Special Survey requirements.
IMO & SOLAS Convention
Maintains statutory records for double bottom inspections, ballast tank corrosion prevention systems, and watertight bulkhead integrity in accordance with SOLAS Chapter II-1.
Transport Canada & MCA
Structures hull maintenance and drydocking logs to satisfy Transport Canada Marine Safety Management Systems and UK Maritime and Coastguard Agency (MCA) Workboat Codes.
Fleet Rabbit vs. Competitors: Commercial Vessel Hull Inspection Software
A feature-level comparison focused on structural plate tracking, shipyard work scope generation, and statutory drydock scheduling. Competitor pricing and feature data sourced from publicly available documentation as of 2026. Request a 1-on-1 technical evaluation.
| Capability | Fleet Rabbit | Fleetio | Samsara | Helm CONNECT |
|---|---|---|---|---|
| Pricing (per vessel) | $5/month | $4–10/month | $27–60/month | Custom Enterprise ($$$) |
| Hull & Ballast Tank Inspection Templates | Pre-built & Class-ready | Generic vehicle only | Generic vehicle only | Pre-built |
| Drydock & UWILD Expiration Tracking | Native (180/90/30 day) | Manual calendar setup | Manual calendar setup | Native |
| Integrated Shipyard Work Scope Builder | Native & automated | Not available | Not available | Native |
| Full Offline Mode (Offshore & Underway) | Full offline auto-sync | Limited | Limited | Native |
| Free Trial | 14 days, up to 3 assets | 14 days | Demo only | Demo only |
| Contract Terms | Monthly or annual | Annual billing discount | 3-year minimum | Annual or multi-year |
Hull Inspection & Drydock Deployment Roadmap
Fleet Rabbit delivers an accelerated onboarding process designed for marine operators, digitizing hull records within 48 hours and establishing full drydock schedule integration in under 2 weeks.
01
Structural Asset Mapping
Upload vessel hull drawings, ballast tank layouts, sea chest valves, and historical UTG reports
02
Drydock Survey Rules Setup
Configure intermediate, UWILD, and 5-year special survey alert windows and lockout triggers
03
Inspection Workflow Setup
Configure digital forms for ballast tanks, rudder pintle clearances, anodes, and void spaces
04
Shipboard Crew Mobile Rollout
Equip chief engineers and vessel masters with the offline-first mobile inspection application
05
Live Drydock Board Go-Live
Activate shipyard work package builders, structural health tracking, and Class audit reports
2-Week Hull & Drydock Deployment Timeline
Modernize hull condition monitoring and shipyard drydock planning with zero interruption to active sailing operations. Request a rollout scope tailored to your fleet.
Week 1
Structural Audit & Survey Threshold Setup
Digitize historical drydock reports, sea valve overhaul logs, and past plate thickness measurements
Set up automated renewal warning thresholds for intermediate and 5-year special survey haul-outs
Assign user permission levels for port engineers, chief engineers, vessel captains, and shipyard coordinators
Week 2
Shipboard Validation & shoreside Go-Live
Conduct brief 15-minute shipboard training on completing offline void space and ballast tank checks
Test automated shipyard scope aggregation from open hull defect notes and running-hour PMS tasks
Verify shoreside dashboard with live structural survey indicators and exportable Class audit packages
DRYDOCK EFFICIENCY GAINS WITHIN 14 DAYS
Commercial marine operators deploying Fleet Rabbit achieve complete oversight of structural hull integrity, eliminate unplanned shipyard change orders, and pass statutory surveys without delays.
35%
Fewer shipyard overruns
100%
Class survey compliance
8 hrs
Saved weekly per engineer
Protect Your Vessel Hulls and Eliminate Shipyard Drydock Overruns.
Fleet Rabbit delivers digital hull plate thickness ledgers, automated drydock schedule alerts, and shipyard work scope generators at just $5/vessel/month with a 14-day free trial.
Real-World Outcomes from Hull Inspection & Drydock Deployments
Proven operational outcomes reported by tug and barge companies, passenger ferry authorities, and offshore support vessel fleets. Request the full marine case study.
Use Case 01
Eliminating Shipyard Steel Change Orders — 16-Vessel Tug Fleet
A coastal towing company frequently suffered costly shipyard change orders and schedule delays during 5-year special surveys due to unmonitored hull plate corrosion in aft void spaces. Fleet Rabbit centralized ultrasonic thickness readings and tank inspection logs, enabling port engineers to pre-order required steel and specify exact plate renewals prior to docking, cutting shipyard change order costs by 40%.
40%
Fewer steel change orders
5 Days
Reduced drydock duration
100%
Class survey adherence
Use Case 02
Automated Sea Valve & UWILD Tracking — 12-Vessel Passenger Ferry Line
A municipal ferry operator managed sea chest valve overhauls and underwater diver inspections across separate paper binders, resulting in near-miss survey deadlines. Fleet Rabbit implemented automated 180-day drydock interval warnings and mobile sea valve maintenance logs, achieving zero survey deficiencies during annual USCG and Class inspections.
0
Class survey deficiencies
75%
Faster drydock scope creation
100%
Digital valve overhaul logs
What Marine Port Engineers Say About Fleet Rabbit
Compiling shipyard drydock repair specifications used to take our port engineering team weeks of digging through paper engine room logs, diver reports, and thickness gauging sheets. Fleet Rabbit consolidated all our hull structural records, sea valve histories, and open defect tickets into an exportable shipyard work package, saving us days of administrative work and preventing costly surprise steel renewals in the yard.
Director of Marine Operations & Port Engineering
Commercial Towing & Harbor Services, Mid-Atlantic US
Frequently Asked Questions
How does Fleet Rabbit track hull plate thickness gauging and structural diminution?
Fleet Rabbit allows port engineers and certified gauging technicians to record ultrasonic thickness measurements directly against digital hull plating schemes, frame numbers, and strake locations. The platform automatically calculates diminution percentages against original design scantlings and Class renewal thresholds, enabling predictive forecasting of required steel plate renewals well ahead of scheduled drydocking periods. Book a demo to view the hull gauging interface.
Does the software automate statutory Class drydocking and UWILD survey schedules?
Yes, Fleet Rabbit automatically tracks statutory 2.5-year intermediate drydock exams, Underwater Inspection in Lieu of Drydocking (UWILD) cycles, and 5-year special surveys for ABS, DNV, Lloyd's Register, and USCG requirements. The system generates automated countdown alerts at 180, 90, and 30 days prior to survey window closures to ensure drydock space and surveyor attendance are secured well in advance. Start a free trial to explore drydock scheduling tools.
Can shipboard engineers perform void space and ballast tank inspections offline at sea?
Yes, the Fleet Rabbit mobile app is designed with a native offline architecture specifically for maritime environments without cellular or satellite internet access. Chief engineers and vessel masters can log ballast tank inspections, void space soundings, anode degradation percentages, and photo-verified hull defect notes completely offline. All recorded data is securely cached locally and automatically syncs to shoreside servers the moment connectivity is restored. Book a demo to test offline syncing.
How does Fleet Rabbit help compile shipyard drydock repair specifications and work packages?
Fleet Rabbit features an integrated Shipyard Work Scope Builder that continuously aggregates deferred hull repair items, sea chest valve overhauls, rudder and tailshaft clearance measurements, and running-hour machinery tasks into a structured specification package. Port engineers can organize tasks by shipyard trade, attach technical drawings and inspection photos, and export formal tender documents for shipyard bidding with a single click. Book a demo to see the work package builder in action.
What is the pricing and contract structure for Fleet Rabbit hull inspection and drydock software?
Fleet Rabbit is priced at a transparent rate of $5 per vessel per month billed annually, covering complete hull plate ledgers, drydock schedule alerts, shipyard specification builders, offline mobile sync, and real-time Class compliance dashboards with no hidden onboarding fees. We also offer flexible monthly billing options and a 14-day free trial on up to 3 assets so marine operations teams can validate the platform directly on working vessels. Sign up for your free trial.
Modernize Your Vessel Hull Inspections and Drydock Scheduling in Less Than 2 Weeks.
Fleet Rabbit provides marine operations with automated drydock schedule alerts, digital plate thickness ledgers, and exportable shipyard repair work packages at $5/vessel/month with a 14-day free trial.
Ultrasonic plate thickness gauging & steel diminution tracking
Automated alerts for intermediate, UWILD, and 5-year special surveys
Offline mobile inspection capture for ballast tanks and void spaces
Integrated shipyard repair specification and work package builder
August 21, 2026
By Edward
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