Tunnel thrusters are installed in the bow or stern in order to improve docking, slow speed maneuvering, emergency steering and station keeping at zero or slow forward speed.

Depending on the type of vessel, the range of application for tunnel thrusters extends from brief docking and casting-off in ports with a limited number of operating hours every year up to continuous operation under extreme load conditions in demanding offshore applications with dynamic positioning.

In order to meet the numerous demands of the many vessel types used around the world Thrust master engineers design tunnel thrusters of aluminum or steel, and, with options regarding the kind of input power (prime movers) needed by the customer. All of Thrust master tunnel thrusters use fixed pitch propellers.

Tunnel Thruster
Suitable for various kind of vessel. According to the different type of propeller, it can be divided into two kinds: CPP type and FPP type.
Model	Max. Power (KW)	Propeller Diameter	Motor Hz	Output rpm	Tunnel Length	Tunnel Thickness	Propeller type
ACIR-TT001	120	700	50	781	1000	10	FPP
			60	937
ACIR-TT002	230	900	50	657	1200	10	FPP
			60	789
ACIR-TT003	335	1100	50	465	1400	15	FPP,CPP
			60	556
ACIR-TT004	480	1300	50	390	1500	15	FPP,CPP
			60	467
ACIR-TT005	770	1650	50	312	1820	15	FPP,CPP
			60	374
ACIR-TT006	990	1850	50	271	2050	20	FPP,CPP
			60	325
ACIR-TT007	1180	2000	50	298	2150	25	FPP,CPP
			60	236
ACIR-TT008	1430	2250	50	219	2350	25	FPP,CPP
			60	267
ACIR-TT009	1980	2450	50	206	2650	25	FPP,CPP
			60	245
ACIR-TT010	2250	2650	50	209	2900	25	FPP,CPP
			60	199