1. Department of Geodesy and Oceanography Gdynia Maritime University Gdynia PL 81374, Poland
2. Department of Transport and Logistics Gdynia Maritime University Gdynia PL 81225, Poland
3. NAVINORD Piotr Cywinski Kaliska PL 83260, Poland
4. Institute of Navigation and Hydrography Polish Naval Academy Gdynia PL 81127, Poland