from typing import List
from typing import Tuple


def navigate_part_one(commands: List[Tuple[str, int]]) -> Tuple[int, int]:
    """Navigate and return the horizontal position and depth."""
    horizontal: int = 0
    depth: int = 0
    for command, units in commands:
        if command == 'forward':
            horizontal += units
        elif command == 'down':
            depth += units
        elif command == 'up':
            depth -= units
    return horizontal, depth