Published Bollard Pull Comparison
Vessel
Owner
Propellers
Screws
# of
engine
# of
Power
Power
Trial
Bollard
Bollard
Lb/HP
Astern
Bollard
Source Publication
type
dia
blades
prop
BHP
density
speed
pull
Efficiency
pull
Efficiency
in
HP/ft2
knots
lb
lb
Niigata Z-Drives with modified 19a Nozzles
Seaspan Discovery
Seaspan International
Niigata ZP-2A
82.68
4
Detroit 149TI-DEC
2
1600
42.91
12.3
87940
1.44
27.48
84,000
1.37
World Book Yearbook 1994 p22
Vancouver
Shafer Transportation
Niigata ZP-2A
82.68
4
Detroit 149TI-DDEC
2
1500
40.23
12.4
82000
1.40
27.33
80,700
1.38
World Book Yearbook 1994 p24
Ocean Intrepide
Le Groupe Ocean
Niigata ZP21 19a
82.68
Mitsubishi S16R-MPTA
2
2,038
54.66
12.5
106,700
1.48
26.18
Tug & Salvage Sep/Oct 98 p31
Point Valiant
Eastern Canada Towing
Niigata ZP-21
79.00
Mitsubishi S16R-MPTA
2
2,038
59.87
90000
1.29
22.08
Marine News May 31, 99 p24
Ocean Intrepide
Le Groupe Ocean RAL
Niigata ZP21 19a
82.68
Mitsubishi S16R-MPTA
2
2,038
54.66
12.8
106,000
1.47
26.01
West Coast Mariner Feb 1999 p37
Point Valiant
Eastern Canada Towing
Niigata ZP-21
79.00
4
Mitsubishi S16R-MPTA
2
2,038
59.87
13.5
101,190
1.45
24.83
American Tugboat review 99 p53
Ocean Intrepide
Le Groupe Ocean
Niigata ZP21 19a
82.68
Mitsubishi S16R-MPTA
2
2,038
54.66
13
100,000
1.39
24.53
American Tugboat review 99 p75
Ulstein Z-Drives with 19a Nozzles
Silex, Thrax
Torksey Ltd.
Ulstein/Liaaen TCN 92/68-250
98.43
Wartsila 6V28
2
2500
47.31
14
132280
1.43
26.46
125,660
1.36
World Book Yearbook 1994 p50
Z-three, Z-four, Z-five
Tugz International
Ulstein 1650H Kort
86.00
4
Cat 3516 B
2
2,000
49.58
12
99,270
1.36
24.82
Tug & Salvage Jan/Feb 99 p23
Fort Bragg
Cape Fear Towing
Ulstein 1650H Kort
90.00
4
Cat 3616 B
2
2,200
49.80
13
119,050
1.49
27.06
Tug & Salvage Jan/Feb 99 p27
Point Clear
Crescent Towing Co.
Ulstein 1650 Kort
85.00
GE 7FDM12A16
2
2,500
63.44
143,300
1.71
28.66
Tug & Salvage Sep/Oct 99 p14
Atlantic Hemlock
Atlantic Towing
Ulstiein Z-Drives
86.00
16-645-E2 EMD
2
2,145
53.17
108,000
1.41
25.17
95,400
1.25
American Tugboat review 96 p6
Gyrfalcon
Alaska Marine Charters
Z-dr Ulstien
86.00
Caterpillar 3516-B
2
2,000
49.58
14
112,000
1.53
28.00
American Tugboat review 96 p18
James Dunlap
Dunlap Towing
Ulstein 1650H z-dr
86.00
4
EMD 16-645E2
2
1,950
48.34
108,000
1.51
27.69
American Tugboat review 96 p42
Z-One & Z-two
Tugz International
Ulstein 1650 Kort
86.00
4
Cat 3516 BTA
2
2,200
54.54
14
112,000
1.44
25.45
American Tugboat review 97 p58
Mamo
Hawaiian Tug & Barge
Ulstein 1650 Kort
90.00
4
Cat 3512B
2
1,600
36.22
13
90,000
1.39
28.13
American Tugboat review 97 p63
SDM New River
Hvide Marine
Ulstein 1650 Kort
86.00
4
Cat 3516B
2
2,000
49.58
12.5
105,000
1.44
26.25
American Tugboat review 98 p58
Fort Bragg
Cape Fear Towing
Ulstein 1650H Kort
90.00
4
Cat 3616 B
2
2,200
49.80
14
120,000
1.50
27.27
American Tugboat review 99 p25
Point Clear
Crescent Towing Co.
Ulstein Kort
85.00
GE 7FDM12A16
2
3,000
76.13
145,000
1.53
24.17
American Tugboat review 99 p33
Z-Three, Z-Four, Z-Five
Great lake Towing
Ulstein 1650 Kort
86.00
4
Cat 3516B
2
2,000
49.58
14
110,000
1.51
27.50
102,000
1.40
American Tugboat review 99 p56
SDM Suwannee River
Hvide Marine
Ulstein 1650 Kort
94.00
4
Wartsila-Vasa 9L20
2
2,000
41.50
12.5
110,000
1.42
27.50
110,000
1.42
American Tugboat review 99 p63
Tira Lani
Sause Bros Ocean Towing
Ulstein 1650H Kort
86.00
4
Cat 3516B
2
2,050
50.82
109,000
1.47
26.59
American Tugboat review 99 p88
Tira Lani
Sause Bros Ocean Towing
Ulstein 1650H Kort
86.00
4
Cat 3516B
2
2,100
52.06
13
120,000
1.59
28.57
100,000
1.33
Work Boat July 99 p34
Aquamaster Z-Drives with modified 19a Nozzles
Impulse
UK Ministry of Defence
Aquamaster US1401
78.74
4
W.H. Allen 8S12
2
1700
50.27
12.75
85100
1.38
25.03
79,145
1.28
World Book Yearbook 1994 p42
Sanergy Tujuh, Lapen, Sembilan
President Marine Pte Ltd
Aquamaster US1701/3000
84.65
Wartsila 6R25
2
2000
51.17
13.8
103610
1.43
25.90
World Book Yearbook 1994 p45
Elizabeth Turecamo
White Stack Marine Corp.
Aquamaster 3001 z-dr
106.30
4
EMD 16-645 E7B
2
3,070
49.81
14
149,900
1.34
24.41
Tug & Salvage Sep/Oct 98 p21
Michel
Peterson & Alpers
Aquamaster US2001
84.65
MaK 8M20
2
2,038
52.15
12.2
112,430
1.54
27.58
Tug & Salvage Nov/Dec 98 p19
Sea Salvor
civil Protection Department - Malta
Aquamaster US2001
90.55
4
MWM Deutz SBV 8M
2
2,253
50.38
12.5
121,250
1.48
26.91
Tug & Salvage Jan/Feb 99 p25
Hasik / Rakhyut
Cory Towage
Aquamaster US 2001
94.50
Caterpillar 3606 TA
2
2,414
49.56
13
121,250
1.38
25.11
113,540
1.29
Tug & Salvage Mar/April 99 p20
Smit Mississippi/ Mersey
Smit International
Aquamaster US 3001 z-drive
102.36
4
Wartsila 6L26
2
2,454
42.94
13.6
134,920
1.44
27.49
124,340
1.32
Tug & Salvage May/June 99 p11
Frigga, Freja, Fenja
Em Z Svitzer
Aquamaster CP US 3001
94.50
MaK 6M25
2
2,446
50.22
14
136,685
1.54
27.94
Tug & Salvage Jul/Aug 99 p18
Cecilia B Slatten
Bisso Towboat Co.
Aquamaster US 2001
90.00
4
EMD 16-645 E6
2
2,150
48.67
14
117,000
1.48
27.21
Tug & Salvage Jul/Aug 99 p21
Smit Ahoada
Smit International
Aquamaster US 2001
94.50
Cat 3516B
2
2,100
43.11
115,960
1.44
27.61
Tug & Salvage Jul/Aug 99 p21
BC Dutt, Tarafdar
Indian Navy
Aquamaster US1201
70.87
Cummins KT3067
2
1,250
45.63
12.3
61,730
1.32
24.69
Tug & Salvage Nov/Dec 99 p19
Persada Jaya, Enny Jaya
Java Marine Lines
Aquamaster US901
63.00
4
Cat 3508BTA
2
1,000
46.19
12
52,910
1.42
26.46
Tug & Salvage Nov/Dec 99 p27
Aventureeaux
Les Abeille
Aquamaster US 1401
78.50
4
ABC 6MDZC
2
1,776
52.84
12
89,300
1.41
25.14
Ship & Boat International Nov 99 p23
Smit Yerwa
Smit International
Aquamaster US 2001
94.50
Cat 3516B TA
2
2,000
41.06
12.7
110,230
1.42
27.56
99,200
1.28
Ship & Boat International Nov 99 p27
Smit Missouri
Smit International
Aquamaster US 3001
106.30
Wartsial 6L26
2
2,454
39.82
13.2
134,480
1.40
27.40
123,457
1.28
Ship & Boat International Nov 99 p27
Spruce & Fir &Hemlock
Atlantic Towing
Aquamaster US 1701 z-dr
83.00
Caterpillar 3516TA
2
2,000
53.23
13.5
112,000
1.57
28.00
American Tugboat review 96 p22
Kinsman Hawk & Condor
Bay Transportation corp.
Aqumaster 3001/3600 z-dr
110.00
4
Wartsila 6R32E
2
3,350
50.76
14
172,000
1.42
25.67
American Tugboat review 96 p25
Eddie C.
Wilmington Transportation
Aquamaster 1701z-drive
86.00
Caterpillar 3516
2
1,600
39.66
14
111,000
1.77
34.69
American Tugboat review 96 p37
Broward
Hvide Marine
Aquamaster 2001/3250 z-drive
75.00
Twin EMD 12-645F7B
2
2,550
83.12
14
120,000
1.53
23.53
American Tugboat review 96 p48
Kinsman Eagle II
Bay Transportation corp.
Aquamaster 3001/3600 z-drive
110.00
Wartsila 6R32E
2
3,350
50.76
14
172,000
1.42
25.67
American Tugboat review 97 p31
Kinsman Venture/Relient
Bay Transportation corp.
Aquamaster 2001/3150 z-drive
91.00
EMD 15-645 E2
2
2,150
47.60
14
110,000
1.38
25.58
American Tugboat review 97 p33
Spruce & Fir &Hemlock
Atlantic Towing
Aquamaster US 1701 z-dr
83.00
Caterpillar 3516TA
2
2,000
53.23
13.5
112,000
1.57
28.00
American Tugboat review 98 p22
Delta Linda & Delta Carey
Baydelta Maritime
Aquamaster z-drives
94.50
4
Cat 3516 B
2
2,200
45.17
14.3
118,000
1.43
26.82
American Tugboat review 98 p32
Elizabeth Turecamo
White Stack Marine Corp.
Aquamaster 3001 z-dr
106.30
4
EMD 16-645 E7B
2
3,070
49.81
14
160,000
1.43
26.06
American Tugboat review 98 p85
Cecilia B Slatten
Bisso Towboat Co.
Aquamaster US 2001
90.00
4
EMD 16-645 E6
2
2,150
48.67
14
117,000
1.48
27.21
American Tugboat review 99 p20
Atlantic Willow
Atlantic Towing Ltd.
Aquamaster US 1701 z-dr
84.00
4
Cat 3516 TA
2
2,002
52.02
12.5
98,000
1.36
24.48
Workboat Dec 98 p66
Cecilia B Slatten 3.422:1
Bisso Towboat Co.
Aquamaster US 2001
90.00
4
EMD 16-645 E6
2
2,150
48.67
14
117,000
1.48
27.21
Work Boat July 99 p46
Willamette
Shaver Transportation Co.
Aquamaster US 2001 PV-Duct
90.55
4
Detroit Diesel 16V149-TI
2
1,800
40.25
105,000
1.49
29.17
Workboat Dec 99 p100
Willamette
Shaver Transportation Co.
Aquamaster US 2001 PV-Duct
90.55
4
Detroit Diesel 16V149-TI
2
1,800
40.25
105,000
1.49
29.17
Harbour & Shipping Nov 99 p34
Rivtow Spirit
Rivtow Marine
Aquamaster 1401
78.74
4
Detroit 16V149TIB
2
1,515
44.80
12.3
85,980
1.50
28.38
ITS Report Aug 96 p35
Van de Giesen Nozzles
El Oriental
Venecia Ship Service
Van de Giesen Nozzles
104.33
4
Cat 3606 TA
2
2,310
38.91
12.6
145,500
1.59
31.49
Tug & Salvage Sep/Oct 98 p25
Teign
Teignmouth Harbour Commision
Van de Giesen Nozzles
39.37
Cummins NT855-M/CR
2
304
35.96
9.5
17,636
1.43
29.01
ITS Report July 97 p15
Fixed Conventional ("Kort") Nozzles
Manutara II
Sudamericana Agencias
Nozzles
86.61
Yanmar T240A-ET
2
1400
34.22
12
80000
1.38
28.57
World Book Yearbook 1994 p26
Koyo Maru
Nippon Salvage Company
Kamome CPP in Kort Nozzles
137.80
Daihatsu 8DLM-40A
2
5,500
53.11
18.34
265,000
1.35
24.09
Tug & Salvage Sep/Oct 98 p26
Walvis 9-11
Mobile Oil
FP in Nozzles
74.80
Cat 3512 DITA
2
1,280
41.94
12.9
77,160
1.56
30.14
Tug & Salvage Sep/Oct 98 p29
Lamnalco Pelican, Petrel, Puffin
Mobile Oil
Lips CP in Nozzles
92.52
Cat 3516 DITA
2
1,710
36.63
106,900
1.55
31.26
Tug & Salvage Sep/Oct 98 p29
Tiger Wolf
Tiger Tugz
Fixed Nozzles
68.00
4
GM 12V149
2
900
35.69
50,700
1.38
28.17
Tug & Salvage Sep/Oct 98 p33
Maersk Blazer
AP Moller
Kemava CP Nozzles
169.25
MAK 8M32
2
10,010
64.07
17
529,100
1.58
26.43
Tug & Salvage Sep/Oct 98 p33
Secor Vanguard
Seacor
Berg CP Nozzle
140.15
NREC
2
7,000
65.34
16
352,740
1.51
25.20
Tug & Salvage Nov/Dec 98 p23
Assanhado & Abusado
Tranship Venrzuela
Nozzles
66.93
4
Cat 3412B
3
720
29.47
10.2
68,340
1.46
31.64
Tug & Salvage Jan/Feb 99 p27
Neeltje P
Terminales Maracaibo
Rice Nozzle
102.36
Detroit 12V-4000
2
2,300
40.25
13.6
132,280
1.47
28.76
90,390
1.00
Tug & Salvage Mar/April 99 p19
Sall
Bahwan-Lamnalco
Promarin Nozzle
80.71
Cat 3512DITA/B
2
1,360
38.28
12.7
83,770
1.55
30.80
Tug & Salvage May/June 99 p13
Vera Bisso
Bisso Towboat Co.
Kort Nozzles
138.00
4
EMD 16-645-E6
2
2,100
20.22
13
145,500
1.41
34.64
Tug & Salvage Nov/Dec 99 p17
Jaya Mariner
Java Marine Lines
CP Kort Nozzle
106.30
4
Wartsila 6L26
2
2,650
43.00
147,700
1.46
27.87
Tug & Salvage Nov/Dec 99 p25
Tiger Wolf
Tiger Tugz
Fixed Nozzles
68.00
4
GM 12V149
2
900
35.69
50,000
1.36
27.78
West Coast Mariner Jan 1999 p17
Thorax
Ostensjo Redori A/S
Ulstein Liaaen CP Kort
122.05
Wartsila 6R32E
2
3,600
44.31
14.5
198,400
1.45
27.56
187,400
1.37
Ship & Boat International Nov 99 p19
Scott T. Slatten
Bisso Towboat Co.
Nozzle kort
80.00
Detroit Diesel
3
1,700
48.70
13
110,000
1.18
21.57
American Tugboat review 96 p28
Capt. Billy Slatten
Bisso Towboat Co.
Kort Nozzles
80.00
4
Detroit Diesel 16V-149TI
3
1,750
50.13
12
110,000
1.15
20.95
American Tugboat review 97 p36
Sean & Grant Candies
Otto Candies, Inc.
BQR Nozzle
144.00
4
EMD 16-645
2
3,070
27.14
200,000
1.46
32.57
American Tugboat review 97 p72
New Orleans
Crescent Towing Co.
Kort
83.00
4
Cat 3516
2
2,250
59.88
15
117,000
1.52
26.00
American Tugboat review 98 p42
James Palladino
Inland Bulk Transfer
Kort Nozzles
99.00
4
Cummins-Wartsila 16V-170
2
2,500
46.77
14
120,000
1.29
24.00
American Tugboat review 99 p66
Elsbeth III
Smith Maritime
Harrington Nozzles
88.00
4
16 cyl
3
1,450
34.33
12
120,000
1.34
27.59
American Tugboat review 99 p93
Capt. Billy Slatten
Bisso Towboat Co.
Kort Nozzles
80.00
4
Detroit 16V-149TI
3
1,440
41.25
12
121,250
1.45
28.07
ITS Report July 97 p13
Somarco IV
Somarco Ltda
Promarin Nozzle
92.52
KTA M2
2
1,700
36.41
12.9
103,400
1.50
30.41
ITS Report July 97 p15
Pacific Buccaneer
Swire Pacific Offshore
Ulstein CP Nozzles
168.11
Wartsila 12V32
2
6,120
39.70
16.3
324,076
1.35
26.48
ITS Report July 97 p17
US Navy SS Tug
US Navy
UK Kort Propulsion
105.00
EMD 12V-645-E7
1
2,150
35.75
13
63,000
1.44
29.30
ITS Report Sep 97 p14
MCS Lenie
Bristol
Fixed Nozzles
74.80
Cat 3508B-TA
2
1,100
36.05
12.5
59,524
1.33
27.06
ITS Report Sep 97 p18
Gulf Service
Tidewater
Kort Nozzles
130.00
8SW280+6SW280
2
5,600
60.75
16
270,000
1.41
24.11
Proffesional Mariner June/July 97 p38
Shottel Z-Drives with 19a Nozzles
ASD 3211
Cory Towage
Shottel SPR 1212
90.55
Wartsila 6L26
2
2,213
49.49
13
117,950
1.46
26.65
Tug & Salvage Nov/Dec 98 p23
RT Pioneer/ Inovation
Kotug
Shottel SPR 1212
86.61
Cat 3516 B DITI
3
2,100
51.33
12
165,350
1.46
26.25
162,040
1.43
Tug & Salvage Jan/Feb 99 p18
RT Pioneer/ Inovation 2 engines
Kotug
Shottel SPR 1212
86.61
Cat 3516 B DITI
2
2,100
51.33
9.5
110,230
1.46
26.25
Tug & Salvage Jan/Feb 99 p18
Cormorant
Walvis Bay, Namibia
Sottel Rudderpropeller
55.12
Cat 3412
2
548
33.07
10
27,780
1.21
25.35
Tug & Salvage Mar/April 99 p21
Tembega 3
PT Freeport
Shottel SPR 2020
102.36
Cat 3606
2
3,084
53.97
143,300
1.31
23.23
Tug & Salvage May/June 99 p17
Bulldog
Bukser og Bjergning
Shottel SPR 2020
102.36
Cat 3606
2
2,752
48.16
13.25
146,600
1.45
26.64
136,680
1.35
Tug & Salvage May/June 99 p19
Rotor Tug
KOTUG
Shottel SRP 1212 FP
85.00
5
Cat 3516B TI TA
3
2,100
53.29
12
165,345
1.47
26.25
165,345
1.47
Proffesional Mariner Aug/Sep 99 p24
Fixed NautiCAN Nozzles
Lorain
Island Sea Marine
NautiCAN HE Nozzle
112.00
3
Diesel Electric
1
1,221
17.85
12.9
55,540
1.77
45.49
BC Research
Barbara Foss
Foss Maritime Co.
NautiCAN HE Nozzle
108.00
3
EMD 16-645 E6
2
2,150
33.80
13.48
142,600
1.60
33.16
103600
1.16
PTL & ABS Certified
San Pedro
Wilmington Transportation
NautiCAN HE Nozzle
112.00
3
EMD 16-645 E6
1
2,150
31.42
77,200
1.69
35.91
LA Harbour Safety
TS-40 Uzmar
Uzmar
NautiCAN HE by Lips BV
80.70
3
2
1,360
38.29
12.2
97,000
1.79
35.66
Uzmar
Degancay
Sanmar RAL
NautiCAN HE by Lips BV
80.71
4
Cat 3512 TA
2
1,445
40.67
13.2
88,190
1.57
30.52
Tug & Salvage Sep/Oct 98 p21
Phillips Foss
Foss Maritime Co.
NautiCAN HE Nozzle
104.00
3
EMD 16-645 E6
2
2,150
36.45
142,000
1.63
33.02
Emerald
NautiCAN Nozzles on Z-drives
Daniel Foss
Foss Maritime Co.
Ulstein+NautiCAN HE
72.00
4
Cat 3512B
2
1,650
58.36
90,000
1.58
27.27
Weir-Jones-ABS Certified
Daniel Foss
Foss Maritime Co.
Ulstein 900H UHPN
72.00
4
Cat 3512B
2
1,650
58.36
13
90,000
1.58
27.27
Tug & Salvage Nov/Dec 98 p15
Daniel Foss
Foss Maritime Co.
Ulstein 900 NautiCAN Nozzle
72.00
4
Cat 3512
2
1,650
58.36
90,000
1.58
27.27
West Coast Mariner Jan 1999 p19
NautiCAN Nozzles with Stator on Z-drives
Peter Foss
Foss Maritime Co.
Ulstein+NautiCAN HE+Stator
72.00
4
Cat 3512B
2
1,650
58.36
93,000
1.63
28.18
Weir Jones
Western Titan
Western Towboat Co.
Ulstein+NautiCAN HE+Stator
100.00
3
Cat 3516B
2
2260
41.44
13.4
141,500
1.62
31.31
Diehl Engineering
Ulstein Z-Drives with UHPN Nozzles and Stators
Delta Linda New
Baydelta Maritime
Ulstein 1650H UHPN+Stator
94.50
4
Cat 3516 B
2
2,200
45.17
14
130,000
1.57
29.55
American Tugboat review 99 p17
Delta Linda, Delta Deanna
Baydelta Maritime
Ulstein 1650H UHPN+Stator
94.50
4
Cat 3516B
2
2,200
45.17
138,000
1.67
31.36
Pacific Maritime Mag Jan 2000 p13
Waipapa
North Port
Ulstein 1650H UHPN+Stator
86.00
4
Cat 3516B
2
2,100
52.06
112,430
1.49
26.77
UML Bertil
Vessel
Owner
Propellers
Screws
# of
engine
# of
Power
Power
Trial
Bollard
Bollard
Lb/HP
Astern
Bollard
Source Publication
type
dia
blades
prop
BHP
density
speed
pull
Efficiency
pull
Efficiency
in
HP/ft2
knots
lb
lb
Bollard efficiency is defined as a Bollard Pull / Theoretical Ideal Propeller Thrust where Ideal Thrust
R=Propeller Radii in feet
TI=Ideal Thrust in lb