Analysis of Hydrodynamic Interaction Between HMCS FREDERICTON and USNS KANAWHA
Bibliographic record
Abstract
Abstract : HMCS FREDERICTON collided with USNS KANAWHA on 18 November 2010 while FREDERICTON was approaching KANAWHA for replenishment at sea. The ships were in calm water of depth greater than 600 m. VENTURE Naval Officers Training Centre (NOTC) requested that DRDC Atlantic investigate whether hydrodynamic interactions between the two ships contributed to the occurrence of the collision. It is unlikely that hydrodynamic interaction effects were a factor in causing a collision between FREDERICTON and KANAWHA. In the present report, the non-dimensional lateral separation is defined as the lateral separation distance divided by the beam of the larger ship. FREDERICTON and KANAWHA had a non-dimensional lateral separation of 3.0 when FREDERICTON commenced unexpected motion behaviour. Available data suggest that hydrodynamic interaction forces at the onset of unexpected motion behaviour were likely less than 10 percent of hydrodynamic interaction forces that would have been experienced when closer to the alongside refueling position. During replenishment operations, ships typically have forward speed Froude numbers less than 0.2. Under such conditions, wave-making effects will be small, simplifying analysis of flow conditions.
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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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".