Errors Messages

Method cannot be used

Check the limits for ALL the parameters for the chosen method.

Analysis abandoned

Failure in calculation routines for the design condition whereupon the calculation will terminate. Check the limits for the chosen method.

Analysis of this condition abandoned

Failure in calculation routines for the particular condition whereupon Hydro will proceed to analyze the next condition. Check the limits for the chosen method.

Length of the ship is outside the valid range

Check the limits for the chosen method.

Block and/or prismatic coefficient is outside the valid range

Check the limits for the chosen method.

Length/breadth ratio is outside the valid range

Check the limits for the chosen method.

Breadth/draught ratio is outside the valid range

Check the limits for the chosen method.

Longitudinal centre of buoyancy is outside the valid range

Check the limits for the chosen method.

Bulb area is outside the valid range

Check the limits for the chosen method.

Sea water temperature is outside the valid range

Check the limits for the chosen method.

Volumetric Coefficient is outside the valid range

Check the limits for the chosen method.

Loading Coefficient (Ap/disp^2/3) is outside the valid range

Check the limits for the chosen method.

LCB/Chine Length % is outside the valid range

Check the limits for the chosen method.

Chine Length/Breadth over chines is outside the valid range

Check the limits for the chosen method.

Deadrise angle at 50% Lp is outside the valid range

Check the limits for the chosen method.

Values of LCB/Chine Length %

and Loading Coefficient (Ap/disp^2/3)

fall outside required bounds

Check the limits for the chosen method

(see Warning Messages - Range of Application of Chine Information - Range validation 1).

Values of Deadrise angle at 50% Lp

and Loading Coefficient (Ap/disp^2/3)

fall outside required bounds

Check the limits for the chosen method

(see Warning Messages - Range of Application of Chine Information - Range validation 2).

Values of Chine Length/Breadth over chines

and Loading Coefficient (Ap/disp^2/3)

fall outside required bounds

Check the limits for the chosen method

(see Warning Messages - Range of Application of Chine Information - Range validation 3).

Values of LCB/Chine Length %

and Chine Length/Breadth over chines

fall outside required bounds

Check the limits for the chosen method

(see Warning Messages - Range of Application of Chine Information - Range validation 4).

Values of LCB/Chine Length %

and Deadrise angle at 50% Lp

fall outside required bounds

Check the limits for the chosen method

(see Warning Messages - Range of Application of Chine Information - Range validation 5).

Values of Deadrise angle at 50% Lp

and Chine Length/Breadth over chines

fall outside required bounds

Check the limits for the chosen method

(see Warning Messages - Range of Application of Chine Information - Range validation 6).

All Taylor Cr values are zero

The Cr values obtained from the Taylor-Gertler prediction are all zero. This can happen when the current hullform is actually within the limits of the Taylor allowable range, but sufficiently close to the limits for there to be little or no data. Either choose another resistance method, or alter the hullform parameters to be nearer the center of the Taylor range.

Holtrop & Mennen: Cp & Lcb do not satisfy Cp < 0.9069 + 0.0155*Lcb (Lcb as %)

The above equation is not satisfied. Hydro stops to allow you to re-enter values of Cb, Cm and Lcb so that the equation is satisfied.

The chosen propulsion factors method is not available for twin screw ships

Check the propulsion factors method and/or the twin screw options. Note that the BSRA Methodical Series and Series 60 propulsion factors methods cannot be used to estimate the propulsion factors for twin screw ships.

Speeds outside resistance method speed range

Check the speed range limits for the resistance method chosen.

No. of speeds must be between 0 and 50

There is a limit in Hydro of 50 individual speeds. Check the minimum speed, maximum speed and increment so that this limit is satisfied.

Design speed outside given speed range for this method

Check the design speed and speed range entered, although altering the speed range may not actually help, since the speed range may have been reduced to comply with the limits of the chosen method.

BAR outside cavitation limits

It is impossible to design a suitable propeller which satisfies Burrill's 5% cavitation line. Check the propeller design parameters and re-calculate.

Too many iterations for design propeller

The propeller optimization module cannot find a suitable propeller for the constraints it has been given. Check the propeller parameters and design condition and re-calculate.

Negative Kq values in propeller method

The propeller optimization module cannot find a suitable propeller for the constraints it has been given and as a result has calculated invalid Kq values. Check the propeller parameters and design condition and re-calculate.

The selected resistance method has no ratios associated with it in the chosen resistance ratios file

The analysis for this particular condition has stopped since there are no resistance ratios associated with the chosen resistance method, in the selected file. Either choose a different resistance ratios file, choose a different resistance method, or do not use the resistance ratios.

Resistance method has produced negative resistances. Edit hullform/resistance method data and retry.

The resistances obtained from the chosen resistance prediction are negative. This can happen when the current hullform is actually within the limits of the allowable range, but sufficiently close to the limits for there to be little or no data. It can also occur if you have used a resistance ratio file with particularly bad ratios. Either choose a different resistance method, choose a different resistance ratio file (if applicable), or alter the hullform parameters to be nearer the middle of the chosen resistance method range.