2013
Year
C-GDZC — 2013 Jonker JS1C 18/21
C-GDZC is a 2013 Jonker JS1C 18/21 based in CNV4 Hawkesbury, Ontario, listed on the Transport Canada Civil Aircraft Register (serial 1C-048).
Glider / sailplane
Category
Ontario
Based
1
On CA register
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The aircraft
Year built2013 · 13 years old
Airframe typeWhether Transport Canada classes it as an aeroplane, a helicopter, a glider, a balloon or a gyroplane.Glider
Max take-off weightMaximum take-off weight: the heaviest the aircraft may legally be when it starts its take-off roll, including fuel, people and baggage. It's the number that decides what licence and ratings you need, and what it costs to park.720 kg · 1,587 lb
Where it's based
BasedThe city or airport Transport Canada holds as the aircraft's base. Where the field holds a four-letter code like CYXE, that's the airport's ICAO identifier.CNV4 Hawkesbury, Ontario
Transport Canada officeThe Transport Canada regional office that administers this registration. It follows the owner's address, so it isn't always the nearest office to where the aircraft actually sits.Dorval
Identity
Serial numberThe manufacturer's own number for this individual airframe, stamped on a plate. Unlike the registration, it never changes — it identifies the aircraft across every country it's ever been registered in.1C-048
ManufacturerThe full legal name of the company that built it, which is often not the name on the tail. A Cessna 172 built in 2022 was made by Textron Aviation.Jonker Sailplanes
Built inWhere the aircraft was manufactured. Most of Canada's fleet was built in the United States.Republic of South Africa
ICAO 24-bit addressA unique 24-bit number your transponder broadcasts with every Mode S and ADS-B message — flight trackers key on it rather than the tail number. Canada's block runs C00000 to C3FFFF, which is why Canadian aircraft nearly all start C0 to C3. Transport Canada assigns it against the registration, so it changes if the aircraft is re-registered.C04F21
Registration
Registration typePrivate, Commercial or State. Commercial means the registration permits use for hire or reward — charter, flight training, aerial work. It describes the registration, not who owns the aircraft.Private
Basis of registrationThe rule the aircraft is registered under. Most are registered against a type certificate, meaning they're a factory design approved by the regulator; amateur-built and ultralight aircraft come in under their own standards.CAR 507.03 Special Certificate of Airworthiness - Limited
Registered sinceWhen the current registration took effect. A recent date usually means the aircraft changed hands or was re-registered — it is not the date it was built.11 May 2026
Imported to CanadaWhen the aircraft was first brought onto the Canadian register from abroad. Only recorded for imported aircraft, which is about a third of the fleet.26 April 2021
Where C-GDZC is, and how to track it
C-GDZC transmits ADS-B under the 24-bit address C04F21. Trackers key on that address rather than the tail number, so it finds the aircraft even on flights flown under a different callsign. Transport Canada assigns the address against the registration, so it changes if the aircraft is re-registered.
Most private aircraft are on the ground most of the time — if a tracker shows nothing, it is very likely parked rather than missing.
How rare is C-GDZC?
The Jonker JS1C 18/21 is very rare in Canada — there are 1 registered on the Transport Canada Civil Aircraft Register.
- Median year built in Canada's glider / sailplane category: 1978 — C-GDZC is newer than half of that fleet.
- One of 591 aircraft in Canada's glider / sailplane category, 241 of them in Ontario.
- 2 aircraft are based in CNV4 Hawkesbury.
Not for sale right now
C-GDZC is not listed on MarketPlane. If it ever is, we can tell you — one email, then nothing. No account needed.
Reported occurrences
Transport Canada has one report on file mentioning C-GDZC (2012). One records damage.
Substantial · Sep 16, 2012
Accident — landing phase — Okanagan Lake, south of CYLW Control Zone · TSB file A12P0160
Transport Canada describes CADORS entries as preliminary and unsubstantiated, and subject to change. Reports reach the system when somebody files one, so an empty or quiet record is not proof an aircraft has never been damaged — it is not a title search, an airworthiness-directive check or a substitute for a pre-purchase inspection or a look at the logbooks. One entry has a Transportation Safety Board file number; those are investigated separately and the TSB publishes its own reports. Source: Transport Canada, Civil Aviation Daily Occurrence Reporting System (CADORS), under the Open Government Licence – Canada.
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Canadian Civil Aircraft Register, current to September 17, 2026. Aircraft data reproduced and distributed with the permission of the Government of Canada. MarketPlane.ca is not affiliated with Transport Canada.