Can bulk carriers be trimmed forward, and for a Handymax size how much can we go with stresses?
Short answer
flowchart LR
A[Cargo surface\nunevenness Δh] -->|≤ B/10| B[Max 1.5 m]
B --> C[BC Code\nMSC.193(79) §5.2.4.3.1]
C --> D[Handymax beam 28–32 m]
D --> E[Δh limit = 1.5 m]
E --> F[Loading manual\nchecks bending moment]
- Can trim forward: Yes — bulk carriers are routinely trimmed forward; trimming is required by the BC Code to reduce cargo shift and structural stress
- Handymax cargo surface limit: unevenness Δh ≤ B/10, capped at 1.5 m (MSC.193(79) Annex 1 §5.2.4.3.1)
- Typical Handymax beam: 28–32 m → B/10 = 2.8–3.2 m, but the 1.5 m cap applies
- Ship trim: forward trim is permissible; exact limits are in the ship’s loading manual and class-approved stability/stress booklet
- Chief Engineer action: verify trim and stresses via loading computer, ensure Δh ≤ 1.5 m, check bending moment and shear force against allowable limits
Full answer
The full answer explains each point step by step, with the regulations and figures behind it and the discussion from other candidates. It is in the MEO Class I section of the Marine One forum, open to members enrolled for the MEO Class I exam.