Open Hatch Carriers - Future Vessel Designs & Operations
Bibliographic record
Abstract
The development of Open hatch carriers (OHC) dates back to the early 1960s linked to transport of newsprint from the paper mills along the coast of British Columbia (Canada) to the news-printers in San Francisco and Los Angles (USA). Prior to that, conventional general cargo ships, tween-deck liners and trampers transported newsprint and lumber (timber). The present OHC fleet transport a wide range of commodities in addition to the initial newsprint, i.e. timber (lumber), fertilizer (both as bulk and in bags), minor bulk, containers, project cargoes and even road units on multi decks. This implies that the present OHC fleet are competing with dry bulkers for typical dry bulk cargoes, and with container vessels and Ro-Ro's for cargo types, which requires more careful handling. The paper presents an overview of the historic development of transport efficiencies from the steam ships used in newsprint and timber trades in the early 1900 up to the latest generation of OHC's. Followed by a parametric feasibility study focusing on identifying cost and improvement potentials for new alternative designs versus the present. The results indicates that alternative combinations of main measurements to enable lower block coefficients reduces fuel consumption and greenhouse gas emissions (GHG) per freight unit transported. Moreover, these designs might increase the competitiveness of Open Hatch vessels versus their competitors, i.e. dry-bulk, container and Ro-Ro.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".