Question: What was Jacques Cartier searching for when he arrived at the Ottawa River that would give him a passage to the Pacific Ocean?

Context articles: Jacques Cartier Bridge
Northwest Passage
Quebec Route 134
Parting of the Waters
Brewery Creek
Jacques Cartier
Hochelaga (village)
Jacques Cartier Park
HMCS Ottawa (FFH 341)
Donnacona

The Jacques Cartier Bridge (French: "pont Jacques-Cartier" ) is a steel truss cantilever bridge crossing the Saint Lawrence River from Montreal Island, Montreal, Quebec to the south shore at Longueuil, Quebec, Canada.
 The bridge crosses Île Sainte-Hélène in the centre of the river, where offramps allow access to the Parc Jean-Drapeau and La Ronde amusement park.
The Northwest Passage (abbreviated as NWP) is, from the European and northern Atlantic point of view, the sea route to the Pacific Ocean through the Arctic Ocean, along the northern coast of North America via waterways through the Canadian Arctic Archipelago.
 The eastern route along the Arctic coasts of Norway and Siberia is accordingly called Northeast Passage (NEP).
Route 134 is a highway in the province of Quebec, running from Candiac on the South Shore of the Saint Lawrence River to Montreal, crossing the river on Jacques Cartier Bridge.
 On the South Shore, Route 134 is named Taschereau Boulevard ("boulevard Taschereau"), after the prominent Quebec family that included former premier Louis-Alexandre Taschereau.
 From Jacques Cartier Bridge to the end of the highway at Sherbrooke Street (Quebec Route 138) in Montreal, the highway is a one-way pair formed by Papineau Avenue and De Lorimier Avenue.
Parting of the Waters is an unusual hydrologic site at Two Ocean Pass on the Great Divide, within the Teton Wilderness area of Wyoming's Bridger-Teton National Forest.
 Two Ocean Pass separates the headwaters of Pacific Creek, which flows west to the Pacific Ocean, and Atlantic Creek, which flows east to the Atlantic Ocean.
 At Parting of the Waters, at , North Two Ocean Creek flows down from its drainage on the side of Two Ocean Plateau and divides its waters more-or-less equally between its two distributaries, Pacific Creek and Atlantic Creek.
 From this split, Two Ocean Creek waters flow either 3488 mi to the Atlantic Ocean via Atlantic Creek and the Yellowstone, Missouri and Mississippi Rivers, or 1353 mi to the Pacific Ocean via Pacific Creek and the Snake and Columbia Rivers.
 In the marshy area of Two Ocean Pass adjacent to Parting of the Waters, water actually covers the Continental Divide such that a fish could swim from the Pacific Ocean to the Atlantic Ocean drainages.
 In fact, it is thought that this was the pass that provided the route for Yellowstone cutthroat trout to migrate from the Snake River (Pacific) to Yellowstone River (Atlantic) drainages.
Brewery Creek ("Ruisseau de la Brasserie") is a small creek that forms the northern and western shores of Île Hull.
 It circles the downtown of the Hull sector, of Gatineau, Quebec.
 It runs into the Ottawa River just west of downtown Hull.
 Running west of Montcalm Street it turns east north of the highway, running up to Jacques Cartier Park where it rejoins the Ottawa River.
 Originally it was at the heart of Hull's industrial sector, with a number of factories.
 This included several breweries, from which it gets its name.
 In the 1980s the area was refurbished by the National Capital Commission.
 The former water works on a small island in the creek became the Théâtre de l'Île and the Montcalm Street Bridge was replaced by the ornate Tour Eiffel Bridge.
 Its pollution removed, it has become a popular location for birders.
Jacques Cartier (Breton: "Jakez Karter" ; December 31, 1491September 1, 1557) was a Breton explorer who claimed what is now Canada for France.
 Jacques Cartier was the first European to describe and map the Gulf of Saint Lawrence and the shores of the Saint Lawrence River, which he named "The Country of Canadas", after the Iroquois names for the two big settlements he saw at Stadacona (Quebec City) and at Hochelaga (Montreal Island).
Hochelaga was a St. Lawrence Iroquoian 16th century fortified village on or near Mount Royal in present-day Montréal, Québec, Canada.
 Jacques Cartier arrived by boat on October 2, 1535; he visited the village on the following day.
 He was greeted well by the Iroquoians, and named the mountain he saw nearby "Mount Royal".
 Several names in and around Montréal and the Hochelaga Archipelago can be traced back to him.
Jacques Cartier Park is a park in Gatineau, Quebec, across the river from the National Gallery of Canada in Ottawa.
 It is named for French explorer Jacques Cartier, who arrived at the mouth of the Ottawa River while he was looking for the Northwest Passage.
 The National Capital Commission (NCC) uses the site to run one of its popular annual events, Winterlude every February.
 It is also a busy site on Canada Day, offering activities such as music and dance shows throughout the day, entertainment and activities for children, and demonstrations by the Canadian Forces SkyHawks parachute team.
HMCS "Ottawa" is a Royal Canadian Navy "Halifax"-class frigate .
 "Ottawa" is the twelfth and final ship of the "Halifax" class that were built as part of the Canadian Patrol Frigate Project.
 She is the fourth vessel to carry the designation  .
 The first three were named for the Ottawa River.
 This ship is the first named for Canada's national capital, the City of Ottawa.
 She is assigned to Maritime Forces Pacific (MARPAC) and is homeported at HMC Dockyard, CFB Esquimalt.
 "Ottawa" serves on MARPAC missions protecting Canada's sovereignty in the Pacific Ocean and enforcing Canadian laws in its territorial sea and Exclusive Economic Zone.
 "Ottawa" has also been deployed on missions throughout the Pacific and to the Indian Ocean; specifically the Persian Gulf and Arabian Sea on anti-terrorism operations.
Chief Donnacona (died c. 1539 in France) was the chief of the village of Stadacona, located at the present site of Quebec City, Canada.
 French explorer Jacques Cartier, concluding his second voyage to what is now Canada, returned to France with Donnacona.
 Donnacona was treated well in France but died there.
 Later Cartier would make a third voyage to the same area.