Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
A ship in a dream is salvation for one who is in hardship or worry. Boarding it indicates following guidance and escaping strife. Its sinking is a calamity and destruction. Whoever sees that he owns a ship will get married or buy a maidservant.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
A ship indicates the mother, father, wife, or an animal. Its sailing on land is heresy and strife. Boarding it with righteous people is salvation and blessing. Exiting it is safety and relief.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
A ship is interpreted as salvation from worry, grief, and fear. Boarding it in a raging sea indicates entering a dangerous affair. A small boat indicates a son or a servant.