I remember being guided by my trusty nav (35-odd years ago!) into night close formation on an unlit Bear D in the Iceland-Faroes gap with me on instruments (no NVG) and him using the now antique hand-held monocular shufti-scope: "right one degree, come up 10 feet, fly level" followed by "fly level, fly level, Gate!, fly level" - he used the extra light from the reheat to read the door number as we shot out from underneath it.
With the benefit of hindsight, it wasn't the cleverest thing either of us did that night, but we did get the number...