The Array of Long Baseline Antennas for Taking Radio Observations from
  the Sub-Antarctic
  Measurements of redshifted 21-cm emission of neutral hydrogen at <30 MHz have
the potential to probe the cosmic "dark ages," a period of the universe's
history that remains unobserved to date. Observations at these frequencies are
exceptionally challenging because of bright Galactic foregrounds, ionospheric
contamination, and terrestrial radio-frequency interference. Very few sky maps
exist at <30 MHz, and most have modest resolution. We introduce the Array of
Long Baseline Antennas for Taking Radio Observations from the Sub-Antarctic
(ALBATROS), a new experiment that aims to image low-frequency Galactic emission
with an order-of-magnitude improvement in resolution over existing data. The
ALBATROS array will consist of antenna stations that operate autonomously, each
recording baseband data that will be interferometrically combined offline. The
array will be installed on Marion Island and will ultimately comprise 10
stations, with an operating frequency range of 1.2-125 MHz and maximum baseline
lengths of ~20 km. We present the ALBATROS instrument design and discuss
pathfinder observations that were taken from Marion Island during 2018-2019.
