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Knowledge Base // Tutorial 96

Find Direction by the Stars on the Big Island: Hawaiian Star Compass Basics

Difficulty: Easy ~20 min read + a clear night Outdoors · Night sky · Wayfinding

Long before magnetic compasses, Polynesian navigators crossed thousands of miles of open ocean by reading the stars, sun, swells and birds. In Hawaiʻi that knowledge was revived with the voyaging canoe Hōkūleʻa, and navigator Nainoa Thompson developed the Hawaiian star compass to teach it. This guide is a respectful beginner’s introduction: how the star compass divides the horizon, how to find Hōkūpaʻa (the North Star), how to check your latitude with your hand, and how rising stars and the sun give direction. It won’t make you a navigator, but it will change how you look at a Big Island night sky.

Safety // Read First

Warnings

CriticalPractice somewhere you already know, like a beach park, a lānai or a designated stargazing area. Don’t hike unfamiliar terrain in the dark to practice: the National Park Service advises staying put if darkness catches you unless you know the trail well and have a light. On Maunakea, follow the rangers’ rules: the summit closes to visitors after sunset, and stargazers go down to lower areas. Keep a real compass, map and light for any actual trip.

Checklist // Before You Start

What You Need

Walkthrough // Steps 01–08

Learn the compass, find north, measure, read the horizon

  1. Step 1: Learn the four directions

    The star compass is a mental construct, not a physical tool. It starts with where celestial bodies come and go:

    • Hikina (east): “arriving”, where the sun and stars arrive at the horizon.
    • Komohana (west): “entering”, where they enter the horizon.
    • ʻĀkau (north): “right”, as you face west.
    • Hema (south): “left”, as you face west.

    Try it: face where the sun set, and your right hand points north.

  2. Step 2: Learn the quadrants and houses

    The four directions divide the horizon into quadrants named for winds: Koʻolau (NE, named for the trade winds’ windward side), Malanai (SE), Kona (SW, the leeward side) and Hoʻolua (NW).

    The horizon is split into 32 houses, each 11.25° wide. Moving from east or west toward north or south, each quadrant has the same seven names: Lā (sun), ʻĀina (land), Noio (tern), Manu (bird), Nālani (heavens), Nāleo (voices) and Haka (empty). So “Manu Koʻolau” is NE and “ʻĀina Kona” is WSW.

    A star that rises in a house sets in the house of the same name on the opposite side. A star rising in ʻĀina Koʻolau (ENE) sets in ʻĀina Hoʻolua (WNW).

  3. Step 3: Find Hōkūpaʻa, the North Star

    Hōkūpaʻa (Polaris) sits less than a degree from the north celestial pole, so a line dropped straight down from it to the horizon points north.

    • Find the Big Dipper when it’s above the northern horizon. The two stars at the end of its bowl, Dubhe and Merak, are the “pointer stars”. Follow their line away from the bowl to Polaris.
    • NASA’s Night Sky Network notes the pointers are about 5.5° apart. A common rule of thumb puts Polaris about three fists (30°) from Dubhe.
    • From Hawaiʻi, Hōkūpaʻa sits low in the north, not high overhead as in mainland skies. That’s the next step.

  4. Step 4: Measure your latitude with your hand

    The height of the north celestial pole above the horizon equals your latitude. The Polynesian Voyaging Society notes that from Honolulu (21° N) Hōkūpaʻa appears about 21° up. On the Big Island, which runs from about 18.5° N at South Point to about 20° N in the north, expect it a little lower.

    • Hold your arm straight out and close one eye.
    • A fist is roughly 10°, and your little finger about 1°.
    • Stack fists from the ocean horizon up to Hōkūpaʻa. Close to two fists means you’re at Hawaiʻi’s latitude.

    Navigators used the same idea in reverse: PVS describes sailing up to Hawaiʻi’s latitude east of the islands, then turning west to find land.

  5. Step 5: Read direction from rising and setting stars

    Stars rise in the east and set in the west at the same points every night, so a known star near the horizon is a direction marker. Examples from PVS (positions given for the equator; in Hawaiʻi they shift a little, northward for northern stars and southward for southern ones):

    • Hōkūleʻa (Arcturus) rises in ʻĀina Koʻolau (ENE).
    • Hōkūlei (Capella) rises in Manu Koʻolau (NE).
    • ʻAʻā (Sirius) rises near the border of Lā and ʻĀina Malanai (E by S / ESE).
    • Ke Aliʻi o Kona i ka Lewa (Canopus) rises in Nālani Malanai (SE by S).

    Use stars near the horizon. Stars climb about 1° every 4 minutes, and in Hawaiʻi they rise at an angle (about 20° from vertical, leaning south), so it gets harder to tell where a high star rose.

  6. Step 6: Use the sun and moon too

    • At the March and September equinoxes the sun rises due east and sets due west.
    • At the June solstice it rises in ʻĀina Koʻolau (ENE) and sets in ʻĀina Hoʻolua (WNW); at the December solstice it rises in ʻĀina Malanai (ESE) and sets in ʻĀina Kona (WSW).
    • The moon’s rising point swings between ENE and ESE, and the line between its light and dark sides points roughly north–south.

  7. Step 7: Practice a simple drill

    1. At sunset, note which house the sun set in, and turn so it’s on your left: you are now facing roughly north.
    2. After dark, find Hōkūpaʻa and drop a line to the horizon. Compare with where you thought north was.
    3. Measure Hōkūpaʻa’s height with your fists.
    4. Watch the eastern horizon for a bright rising star and name its house.
    5. Check yourself with a phone compass and note how far off you were.

  8. Step 8: Learn more from the people who keep it alive

    Wayfinding is living knowledge of Hawaiʻi and the Pacific, and this page only scratches the surface. The Polynesian Voyaging Society publishes Nainoa Thompson’s star compass and star lines, and ʻImiloa Astronomy Center in Hilo offers astronomy exhibits and wayfinding education resources. Please learn from them directly.

Pro Tips

Tips

Field Questions // FAQ

FAQ

Can I use this instead of a compass on a hike?

No. Treat it as a skill and a cultural practice to learn, not a substitute for map, compass and a light. Stars are often hidden, and the Big Island’s weather changes fast.

Why is the North Star so low in Hawaiʻi?

Its height above the horizon equals your latitude, and the Big Island is only about 19 to 20 degrees north of the equator.

Why don’t the star positions on this page match exactly?

The PVS examples are given for the equator. As you move north, rising and setting points shift, more for stars far from the celestial equator.

Is the star compass ancient?

It was developed by Nainoa Thompson, building on the Micronesian star compass of his teacher Mau Piailug and on traditional Hawaiian names. PVS describes its history, and the star compass is copyrighted by Nainoa Thompson.

Where can I see a diagram of the star compass?

The Polynesian Voyaging Society publishes it; see the Sources below.

Does the Southern Cross show up in Hawaiʻi?

Yes, low over the southern horizon at some times of year. PVS charts show Hānaiakamalama (the Southern Cross) crossing the meridian above due south in Hawaiʻi, where its top and bottom stars point south.

References // Sources

Sources

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