A little more info to add to twochai's post. From Aviation International News today.
Viking Air told AIN it will use Honeywell Primus Apex avionics in the Twin Otter Series 400, which the company plans to build new at its facility in Victoria, British Columbia. A Honeywell spokesman confirmed that the avionics maker is “in final contract discussions with Viking Air to reach an agreement” on the deal. The integrated suite–already selected for the Pilatus PC-12 and Grob SPn–will enhance crew situational awareness thanks to its vertical terrain display, Viking Air said. Apex also provides other functions, such as constant fuel-level indication, trim position and engine information. The Pratt & Whitney Canada PT6A-34-powered Twin Otter 400 offers a DC electrical system, in place of previous AC systems on models built earlier by Bombardier (neé de Havilland Canada) before production ceased 20 years ago. Because of this change, Viking Air expects to use LED lighting. The company plans to deliver up to 18 aircraft annually starting early next year and claims orders for more than 50 aircraft, with production sold out through 2012.