Towing Bridle Design Check Calculator

Towing Parameters

Continuous static bollard pull of actual tug, BP (MT)

Type of towage

Benign

Normal

Towline Properties

Towline MBL, TBL (MT)

Deployable towline length (with pennant length), DTL (m)

Towing Bridle Properties

MBL of towing bridle leg (MT)

MBL of chafe chain (MT)

Bridle apex angle (deg)

MBL of bridle apex (MT)

Intermediate Wire Pennant

MBL of intermediate wire pennant (MT)

Is there any intermediate wire pennant?

Yes

Shackles & Connections

MBL of towline shackles (MT)

MBL of bridle shackles (MT)

Tow Connections & Fairlead

MBL of fairlead (MT)

MBL of Tow Connection (MT)

Bridle Recovery Arrangement

Combined weight of bridle, delta plate, intermediate wires (MT)

Recovery winch capacity (MT)

MBL of recovery wire (MT)

MBL of recovery shackle (MT)

Emergency Towing Equipment

MBL of fairlead (MT)

MBL of tow connection (MT)

MBL of emergency pennant (MT)

Length of emergency pennant (m)

MBL of extension wire, if present (MT)

MBL of float line (MT)

Length of float line (m)

Towing Bridle Diagram

Design Check Results

Towline Check

Parameter	Required Value	Actual Value	Status
Absolute minimum deployable towline length, ADL	0 m	0 m	-
Required towline MBL	0 MT	0 MT	-

Towing Bridle Check

Parameter	Required Value	Actual Value	Status
Required MBL of towing bridle leg	0 MT	0 MT	-
Required MBL of chafe chain	0 MT	0 MT	-
Required MBL of bridle apex	0 MT	0 MT	-

Intermediate Wire Pennant Check

Parameter	Required Value	Actual Value	Status
Required MBL of intermediate pennant	0 MT	0 MT	-

Shackles Check

Parameter	Required Value	Actual Value	Status
Required MBL of Towline shackles	0 MT	0 MT	-
Required MBL of Bridle shackles	0 MT	0 MT	-

Towline Connections and Fairleads Check

Parameter	Required Value	Actual Value	Status
Required MBL of fairlead	0 MT	0 MT	-
Required MBL of smit brackets	0 MT	0 MT	-

Bridle Recovery Arrangement Check

Parameter	Required Value	Actual Value	Status
Capacity of recovery winch	0 MT	0 MT	-
Required MBL of recovery wire	0 MT	0 MT	-
Required MBL of recovery shackle	0 MT	0 MT	-

Emergency Towing Equipment Check

Parameter	Required Value	Actual Value	Status
Required MBL of fairlead	0 MT	0 MT	-
Required MBL of tow connection	0 MT	0 MT	-
Required minimum length of emergency pennant	0 m	0 m	-
Required MBL of emergency pennant	0 MT	0 MT	-
Required MBL of extension wire	0 MT	0 MT	-
Required MBL of float line	0 MT	0 MT	-
Required length of float line	75-90 m	0 m	-

All design checks are satisfactory

All requirements meet DNV-ST-N001 standards