VARIETY OF ABBREVIATIONS FOR TERMS OF STABILITY By Capt. J.
VARIETY OF ABBREVIATIONS FOR TERMS OF STABILITY
By Capt. J.Isbester, Bulk Carrier Practice,
Nautical Institute, 1993
Identity | Ship A | Ship B | Japanese Ship Building | Ship D | Ship E | UK DTp | RINA | Derrett |
Stowage factor in cubic metres per tonne ( or cubic feet per long ton) | SF | S.F. | SF | SF | ||||
Specific gravity | SG | SG | S.G. | SG | SG | γ | SG | |
Volume of Displacement in cubic metres | V | V | V | |||||
Displacement in tones | Displ | W, Δ | Δ | D | Displ’t | Δ | W, Δ | |
Tonnes per cantimetre immersion, in tones | TPC | TPC | TPI | TPC | TPC | TPC | ||
Moment to change trim one centimetre, in tones- metres | MTC | MTC | MTI | MTC | MCTC | MCTC | ||
Longitudinal distance from the longitudinal center of buoyancy to the longitudinal center of gravity, metres | BG | BG = MG-MB | BG | BG | ||||
Centre of buoyancy from midships (†aft), in metres | LCB | LCB, ÄB | MB | LCB | MB | LCB,ÄB | †LCB | |
Centre of flotation from midships (‡aft), in metres | LCF | LCF, ÄF | MF | LCF | MF | LCF, ÄF | ‡LCF | |
Centre of gravity from midships, in metres | LCG | ÄG | MG | MG | LCG,ÄG | |||
Longitudinal metacentric height above top of keel | KML | LKM | ||||||
Longitudinal Moment | L. MOMENT | |||||||
Centre of gravity above Baseline / top of keel, in metres | KG | KG | KG | KG | VCG,KG | KG | KG | KG |
Center of buoyancy above baseline, in metres | KB | KB | KB | KB | VCB | KB | KB | |
Transverse metacentre above baseline, in metres | KTM | T.KM | TKM | TKM | TKM | KM(T) | KM | KM |
Transverse metacentric height above center of graviry, in metres, without allowing for free surface effect | GM | GM | GM | GM | GM | GM | GM | GM |
Vertical Moment | V. MOMENT | |||||||
Correction for free surface effect, in metres | GG’ | GGo | GoG | GGo | GGv | |||
Transverse metacentric height above center of graviry, in metres, corrected for free surface effect, or fluid metacentric height | G’M, GMf | GoM | GoM Corr.GM (*GM) | ÄGM | GoM | GM fluid | GM F | GvM |
Moment due to free surface effect | i | F.S.MT. | i | I T | I, i | |||
Right arm, in metres, without correction for free surface effect | GZ | GZ | GZ | GZ | G’Z’ | GZ | GZ | GZ |
Right arm, in metres, corrected for free surface effect | GoZ | GoZ | GZ | GZ | GZ | GZ F | GZ | |
Flooding angle, in degrees | qf | qf | f | qf | ||||
Heeling angle at maximum GZ, in degrees | qmax | qm | qmax | m | ||||
Angle of vanishing stability | qv | q R | qr | |||||
Propeller immersion | I/D | I/D | I/D | |||||
Block coefficient | Cb | CB | Cb | CB | C B | C B | ||
Prismatic coefficient | Cp | CP | Cp | CP | C P | C P | ||
Waterplane coefficient | Cwl | CW | Cw | CW | C wp | C w | ||
Midships coefficient | Cm | C MID | Cm | CM | C m | C m | ||
Area of waterplane, in square metres | WP | WA | A w | A | ||||
Draft | T | d | ||||||
Draft (forward), as read | df | df | ||||||
Draft (forward), corrected | dF | dF | D Fore | d fp | d fo, dF | |||
Draft (midships), as read | dm | d Ä, dM | ||||||
Draft (midships), corrected | dM | d Ä | D Mean | ds | d Ä | |||
Draft (aft), as read | da | d ao, Da | ||||||
Draft (aft), corrected | dA | dA | D Aft | d AP | da | |||
Mean of forward and aft corrected drafts | dme | dM | dm’ | |||||
Mean of mean drafts | dM’ | CORR. DRAFT | dm | |||||
Forward direction from midships, and trim by head | (+) | (-) | (-) | (-) | (-) | |||
Aft direction from midships, and trim by stern | (-) | (+) | (+) | (+) | (+) | |||
Value of MG, MB, MF is defined that C.G. or C.B. or C.F. is located abaft midship | (+) | |||||||
Positive BG value is defined that C.G. is located abaft C.B. In this case the ship trims by the stern. | ||||||||
Air draft: forward, midships, aft | Air d (f, m, a) | |||||||
Capacity | M**3 | |||||||
Weight | (LT, MT) | |||||||
Moment | MT-M | |||||||
Shear Force ( Max/Actual) | S.F. | |||||||
Bending Moment (Act/Allow.) | B.M. | |||||||