A simple Python3 script convert a list of POIs into a .ov2 file for loading e.g. onto a GPS satnav.

pois.py

import struct

pois = [
    ('McLaren', 51.34314, -0.54252),
    ('Williams', 51.61672, -1.41096),
    ('Alpine', 51.92018, -1.38986),
    ('Haas', 52.06374, -1.31433),
    ('Mercedes', 52.02262, -1.1495),
    ('Aston Martin', 52.07592, -1.0296),
    ('Red Bull', 52.00815, -0.6929),
]

def main() -> None:
    with open('pois.ov2', 'w+b') as file:
        for poi in pois:
            lat = poi[1]
            lon = poi[2]
            name = poi[0]

            print(name)
            print('lat', lat)
            print('lon', lon)

            lat = int(lat * 100000)
            lon = int(lon * 100000)

            lat_bytes = struct.pack('<l', lat)
            lon_bytes = struct.pack('<l', lon)
            name_bytes = bytes(name, encoding='utf8')
            rec_len = struct.pack('<l', 1 + 4 + 4 + 4 + len(name) + 1)

            rec = b'\x02' + rec_len + lon_bytes + lat_bytes + name_bytes + b'\x00'

            # print(rec)
            print()

            file.write(rec)

if __name__ == '__main__':
    main()