bitts
Let an agent explain bitts and their use, relay design and load standards from maritime sources, describe how lines are made fast, and distinguish bitts from bollards, cleats and capstans.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What bitts are.
Definition
Definition.
Definition
Definition.
- What are bitts, and how do they differ from bollards, cleats and capstans? definition
- Is the question about bitts or another mooring fitting? boundary
Kinds
Kinds.
Kinds
Kinds.
- What kinds of bitts exist on decks, quays and historic ships? definition
- Which entry fits the specific kind? action
Use Use.
Lines
Making fast.
Lines
Lines.
- How are mooring and towing lines made fast on bitts? action
- Which references are standard? provenance
Safety
Safety.
Safety
Safety.
- What safety practices apply to mooring operations and snap-back zones? provenance
- Which entry fits mooring safety? action
Design Design and standards.
Standards
Standards.
Standards
Standards.
- What do ISO 13795 and classification rules require for bitt strength and dimensions? provenance
- Which sources are cited? provenance
Materials
Materials and construction.
Materials
Materials.
- How are bitts built and attached to deck structure? provenance
- Which entry fits ship deck fittings? action
Context History and language.
History
History.
History
History.
- How did bitts develop on sailing ships, and what were riding bitts? provenance
- Which entry fits the history of ship fittings? action
Language
Language.
Language
Language.
- What is the origin of the word bitts and of the phrase bitter end? provenance
- Which entry fits nautical terminology? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.BLT
What it is Filled
A pair of short sturdy vertical posts mounted on the deck of a ship or on a quay, used to secure mooring lines, towing lines and anchor cables by taking turns of rope around them, traditionally of timber and now usually of steel, and distinct from single bollards and from cleats; bitts absorb the loads of mooring and towing and are sized to the vessel.
Why it exists Filled
Let an agent explain bitts and their use, relay design and load standards from maritime sources, describe how lines are made fast, and distinguish bitts from bollards, cleats and capstans.
Distinguishing features Filled
- Paired posts
- Rope turns
- High load capacity
- Deck and quay forms
What robots and AI may and may not do Filled
Must not
- Direct crew to stand in the snap-back zone of a loaded line.
- Advise loading bitts beyond their rated capacity or using damaged bitts.
- Release or make fast mooring lines on a vessel without the master's or mooring team's instruction.
- Hide signs of corrosion or cracking found in inspection.
Only with a human decision
- Any decision to make fast, slip or adjust mooring or towing lines.
May
- Explain what bitts are and how they differ from bollards and cleats.
- Report the rated load of bitts from the vessel's or quay's documentation.
- Monitor mooring line tension on systems it is authorized to watch and raise alarms.
Moral aspects Filled
- Parting mooring lines kill and maim crew and shore workers.
- Mooring failures can endanger the vessel, port and environment.
Who is affected
- Crew and linesmen
- Port workers
- Vessel owners
Owners Filled
Steward
The shipowner for bitts on board; the port authority for bitts on the quay.
Links to other meta-models Filled
parent
- Q1148389 - registry parent class
- deck fitting - on ships
related
- bollard - in registry terms
- mooring line - and towing lines
- cleat - a horned fitting
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.bitts
- Wikidata: Q10729590 (https://www.wikidata.org/wiki/Q10729590)
- ISO: 13795 ships and marine technology, mooring bitts
Direct properties required Filled
- safe working load: up to hundreds of tonnes - on large ships
- standard: ISO 13795 reference - ship mooring bitts
Recognition required Filled
- Paired mooring posts
- Deck bitts, quay bitts, towing bitts
- A bollard is a single post; a cleat is a horned fitting; a capstan is a rotating drum
- Two vertical posts on a common base on a deck or quay.
Capabilities and actions required Filled
- explain the fitting
- relay design standards
- describe line handling
- distinguish from related fittings
Hazards and failure modes required Filled
- Overloading and failure under snap loads
- Injury from parting lines
- Confusing bitts with bollards and cleats
Standards and interfaces required Filled
- ISO 13795 and classification society rules for mooring fittings
- OCIMF mooring equipment guidelines
- Port authority standards for quay bitts
Context of use required Filled
- Securing mooring and towing lines.
- deck mooring bitts
- towing bitts
- quay and pier bitts
- timber bitts on historic ships
- cruciform and double-cross bitts
Sources Filled
- Wikidata item Q10729590: bitts - identity and sense of the item
- Wikipedia: Bitts - general description of the item
Open questions
- Should mooring bollard be the primary linked entry?
- How should maritime standards be linked?
- How should historical timber bitts be recorded?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q10729590/spec.json