DHC Dash 8-Q400

The De Havilland Canada DHC-8, commonly known as the Dash 8, is a series of turboprop- powered regional airliners, introduced by de Havilland Canada (DHC) in 1984. DHC was later bought by Boeing in 1988, then by Bombardier in 1992; then by Longview Aviation Capital in 2019, reviving the de Havilland Canada brand. Powered by two Pratt & Whitney Canada PW100s, it was developed from the Dash 7 with improved cruise performance, lowered operational costs but without STOL performance. Three sizes were offered: initially the 37– 40 seat -100 until 2005 and the more powerful -200 from 1995, the stretched 50–56 seats 300 from 1989, both until 2009, and the 68–90 seats -400 from 1999, still in production. The Q Series are post-1997 variants fitted with active noise control systems.




2,040 km

Cruise Speed

667 km/h

Takeoff Weight

27,987 kg



The Dash 8-400 is the most productive turboprop on the market. Known as the “network builder” due to its short take-off and landing capabilities and efficient regional operations, it comes equipped with more seats, more legroom, more cargo and offers more flights per day.


Role: Turboprop regional airliner
Manufacturer: de Havilland Canada (1983–1992) Bombardier Aerospace (1992–2019), De Havilland Canada (2019–present)
Produced: 1983–present
Developed from: de Havilland Canada Dash 7
Primary users: Jazz Flybe Widerøe Qantas Link NokAir SpiceJet
Number built: 1,249 (as of June 30, 2018)
Developed from: de Havilland Canada

De Havilland Canada Dash 8-Q400 Maritime Surveillance Aircraft (MSA)


Maritime patrol is the task of monitoring areas of water. Generally conducted by military and law enforcement agencies, maritime patrol is usually aimed at identifying human activities.

Peacetime patrols are important for interdiction of criminal activities and for ensuring legal use of waters.

Maritime patrols can be conducted by surface ships and submarines, Maritime Surveillance Aircraft (MSA) and other aerial vehicles, and even by satellites. Human spotting remains an important part of detecting activity, creates deterrence and recently vast electronic systems are used to be more accurate information and reducing the workload of mission operators.

Several types of maritime patrol missions exist:

Law enforcement

Law enforcement

Countries with extensive coastlines are vulnerable to those entering or exiting the country undetected. In particular smuggling is often carried out over water. Law enforcement agencies often employ maritime patrols to assist interception of such activities.



Water areas, in particular those close to the coast, are areas of economic activity. Not only shipping but also fishing and even tourism are important economic activities to coastal countries. Patrolling these waters falls to maritime patrols. Such patrols may seek fishing vessels which are outside of prescribed fishing grounds (often from neighboring countries’ fleets) or which are not adhering to regulations.

Coast defence

Coast defence

Coast defence identifies and intercepts threats to coastal areas. This may include preventing infiltrations or discouraging enemy surveillance of coastal installations. Law enforcement patrols aim at preventing criminals from reaching the shoreline.



Although not necessarily a primary mission of maritime patrol assets, they are often used to assist in maritime rescue operations, both for searching and often to extract survivors too.
The primary roles of MSA are to perform the Maritime Air Operation (MAO), Intelligence Surveillance and Reconnaissance (ISR) Surveillance Capability, Logistic Capability, Search and Rescue (SAR), Medical Evacuation (MEDEVAC) and Casualty Evacuation (CASEVAC).

Series 400

The Q400 is 6.83 m (22.4 ft) longer than the −300
The Series 400 introduced an even longer airframe that was stretched
6.83 metres (22.4 ft) over the Series 300 (10.26 metres (33.7 ft) over the Series 100/200), has a larger, stouter T-tail and has a passenger
capacity of 68–90. The Series 400 uses Pratt & Whitney Canada PW150A engines rated at 4,850 shp (3,620 kW). The aircraft has a cruise speed
of 360 knots (667 km/h), which is 60–90 knots (111166 km/h) higher than its predecessors. The maximum operating altitude is 25,000 ft (7,600 m) for the standard version, although a version with drop-down oxygen masks is offered, which increases maximum operating altitude to 27,000 ft (8,200 m). Between its service entry in 2000 and the 2018 sale to Longview/Viking, 585 have been delivered at a rate of 30-35 per year.

By 2017, the Q400 aircraft had logged 7 million flight hours with 60 operators and transported over 400 million passengers with a dispatch reliability over 99.5%. By July 2018, 844 Dash 8s were in airline service: 143 Series 100 with 35 operators, 42 Series 200 with 16 operators, 151 Series 300 with 32 operators and 508 Q400s. By then, 56 orders were in backlog.


Cockpit crew2
Cabin crew2-Mar
Passengers, typical[email protected]″ Max capacity [email protected]″ Length 107 ft 9 in / 32.8 m
Height Table Data27 ft 5 in / 8.4 m
Wingspan93 ft 3 in / 28.4 m
Wing area 689 ft² / 64 m²
Aspect ratio12.6
WidthFuselage 8 ft 10 in / 2.69 m
Cabin Cabin 8 ft 3 in / 2.52 m
Cabin length61 ft 8 in / 18.80 m
Max takeoff67,200 lb / 30,481 kg
Operating empty39284 lb / 17819 kg [92]
Max payload 18,716 lb / 8,489 kg
Max fuel1,724 U.S. gal / 6,526 L[93]
Engines 2 × PW150
Unit power 5,071 shp / 3,781 kW
High speed cruise300–360 kn / 556–667 km/h
Ceiling27,000 ft / 8229 m
Range1,100 nmi / 2,040 km
Takeoff (MTOW, SL, ISA)4,675 ft / 1,425 m
Landing (MLW, SL)Landing (MLW, SL) – 4,230 ft


1999 variant with a maximum of 68 passengers.

1999 variant with a maximum of 70 passengers.

1999 variant with a maximum of 78 passengers.

Stretched and improved 70–78 passenger version that entered service
in 2000. All Q400s include the ANVS (Active Noise and Vibration

Version of the Q400 with updated cabins, lighting, windows, overhead bins, landing gear, as well as reduced fuel and maintenance costs.
In 2013, an Extra Capacity variant was introduced, capable of carrying a maximum of 86 passengers. The Extra Capacity variant was updated in 2016 with more closely spaced seats to carry up to 90 passengers. The first 90- seat aircraft was delivered to launch customer SpiceJet in September 2018.

Q400-MR Water Bomber
Q400 are adapted to the water bombing role by Cascade Aerospace for the French Sécurité Civile. This tanker can carry 2,600 U.S. gallons of retardant, foam or water and travel at 340 knots.

2007 converted for use as a maritime patrol aircraft.

2008 converted pallet freighter variant with a payload of 9000 kg.

Cargo combi. Seats 50 passengers plus 3720kg (8200 lb) of payload. First delivered in 2015.

ST Airborne Systems first developed (under the name SSC Airborne System) an airborne remote sensing system for the Swedish Coast Guard in
the 70’s. Following a number of successful deliveries in Europe, in the late 90’s the MSS 5000 version of the system was developed. This was
first taken into operation in Norway in 1998 (with installation performed by Bromma Air Maintenance), after which followed several installations for Coast Guard, Air Force and Navy customers in Sweden, Poland, Greece, USA and Portugal among others.

The first MSS 6000 system was taken into operation in Canada in 2006 installed on board a Dash 8 aircraft. Until today more than 20 MSS 6000
systems have been delivered to customers around the world. The latest MSS 6000 version is operated by the Finnish Border Guard and includes
among other things two identical operator consoles and an integrated search radar.

Today ST Airborne Systems offers the MSS 7000 which is based on the earlier MSS versions and the collected experiences from deliveries to
coast guard customers in more than twenty countries around the world. The first MSS 7000 system is today in operation on board a Beech King
Air 350 for the Estonian Border Guard.

Some of the new features of MSS 7000 are:

  • Intuitive user interface for the system operator, based on two large displays
  • User interaction is provided through touch screen interfaces in parallel with standard cursor control devices.
  • Simultaneous display of up to four video channels from the EO/IR sensor
  • Capability to simultaneously record all data (including video) from all sensors
  • Multi-mission capability with dedicated user interface layouts, ‘profiles’, for each mission type.
  • Radar target tracks associated with AIS contact tracks.
  • Correlation of observations with a built-in ship image database.
  • Advanced filtering tool for controlling the object overlays on the tactical map.
  • Built-in image processing tools to assist the operator in detecting hard targets and oil spill areas within SLAR and IR/UV sensor image
  • “Time slider” for viewing and replaying of mission history. The operator can select any time in the mission history, and all video sources
    and all recorded data will replay from that point in time.