| MacTier/Smith Bay Water Aerodrome | |
| Tc: | CMT4 |
| Type: | Private |
| Operator: | David Hatherley |
| Location: | MacTier |
| Timezone: | EST |
| Summer: | EDT |
| Elevation-F: | 742 |
| Coordinates: | 45.2111°N -79.7886°W |
| Pushpin Map: | Canada Ontario#Canada |
| Pushpin Label: | CMT4 |
| Pushpin Map Caption: | Location in Ontario |
| R1-Number: | n/a |
| R1-Length-F: | n/a |
| R1-Length-M: | n/a |
| R1-Surface: | Water |
| Footnotes: | Source: Water Aerodrome Supplement |
MacTier/Smith Bay Water Aerodrome is located 4NM north of MacTier, Ontario, Canada.