01 Berth & hold inspect
Survey holds, hatch dogs, and ballast readiness before loading commences.
Scores are relative 0–100 marks within this atlas. Use them to browse, not as an engineering spec.
SpeedPractical top speed relative to the other forty-eight types in this atlas.
38
EfficiencyEnergy used per useful trip, relative across the atlas.
78
AccessibilityHow easily an ordinary person can use this mode without special training or wealth.
18
SafetyHow safe the mode is per trip, given normal operation and current regulation.
62
Cultural impactHow deeply this mode has shaped language, status and everyday imagination.
52
Tech disruptionHow much this mode is being rewritten by new technology right now.
48
Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Which local authority or corridor rules matter for this type?
Start with the local lens: type approval, operator licences and the hubs named on this page — not a single global checklist.
Is this a buying guide?
No. Tool-Lifes /vehicles is an educational atlas. It explains history, systems and culture without affiliate rankings.
Are the scores official?
No. The six scores are relative editorial 0–100 marks across the 48 types on this site.
Where do the photos come from?
Lead images resolve from Wikimedia Commons via Wikipedia titles on the English masters, with licences recorded on the credits page.
Why metric units?
Metric is the default. Regional notes (US customary, local brand culture) appear in culture and market chapters.
How is this different from a wiki article?
Each type gets seven fixed-depth chapters, comparable scores and cross-type labs — structured for browsing, not a single freeform page.
Operating a Bulk carrier is a closed loop: sense, decide, actuate, and stay inside certified envelopes.
Principles and steps here are physics-first; brand procedures differ, but the envelopes are shared.
Principles
Loading sequence
Hold order and deballast timing keep bending moment within permissible envelope.
Angle of repose
Free-flowing grain shifts GM in seaway—securing rules differ from ore.
Stowage factor
Light grain fills cubic capacity before deadweight; dense ore fills weight first.
Parametric roll
Large hatch openings change waterplane inertia in following seas.
Port turnaround
Grab rate and hold count dominate economics more than sea speed.
Diagrams
Port load sequence
Hold surveyready
Grab loadfill
Deballastbalance
Stress checkverify
Sea loadsail
Dischargeempty
Coal self-heat watch
Hold tempsense
CO/O₂gas
Vent/inertact
Route adjustplan
Port alertreport
Operating steps
02 Sequential load
Follow loading computer plan; deballast in step with shore grabs.
03 Sea passage
Route for weather; ventilate or inert holds per cargo requirement.
04 Monitor cargo
Watch temp and gas on self-heating loads; adjust vents and course.
05 Discharge port
Coordinate grab or conveyor unload; ballast for stability as weight leaves.
06 Hold clean & survey
Washdown and inspection for next cargo grade or charter requirement.
Hard limits
Permissible seagoing strength
Loading must stay within hull girder stress curves at all stages.
SOLAS stability
GM and angle of list limits apply with free-surface in partly filled holds.
Cargo compatibility
Previous hold residue can contaminate next charter—cleaning class rules apply.
Keep exploring
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