Tanker 
A tanker in a dream represents danger and pent up violence. A tanker which explodes in a dream relieves anger that you have kept held back in your waking life.
Alternatively, a tanker may represent your perception of someone's anger with you.
Mariner
To dream that you are a mariner suggests that you are about to embark on an interesting and educational trip to a distant land.
Traffic
To dream that you are in traffic symbolizes sore spots in life when you felt frustrated and hopeless. You feel that your life is in a rut.
Vessels
To dream of vessels is a representation of the physical labor you perform in your waking life.
Admiral
To dream of an admiral indicates a desire to command or lead a group of people, either socially or in a professional setting through a difficult or trying task. An important aspect of this desire is the need to be respected, recognized and awarded for your leadership and courage.
Falling
It can be theorized that to dream of falling is a physical sensation of a drop on blood pressure. As this registers in the brain, the subconscious will alert you of it in this fashion. It produces a sinking feeling such as this. There is however, a religious side to this concept as well. In Christianity, a realm of eternal suffering is located beneath the surface of the Earth. It is called Hell. It is believed to be home to Demons, or Fallen Angels. These Angels were once in the paradise-like realm among the clouds called Heaven. Greed and jealousy however, turned them cruel and full of hate. This caused them to 'fall' down to the underworld.
Because of this, it is thought by some that to dream of falling represents your fall from purity and suggests that you have strayed from your spiritual path. Perhaps you have cheated someone or misled another. One may have this dream as a sign that they need to check and make sure that their thoughts are noble before they act on them.
But the most widely accepted meanings of falling dreams have nothing to do with science, nor with religion. Generally, if you fall within a dream, it is thought to have to do with balance, or rather a lack thereof. Most likely you have been increasingly stressed due to a recent failure in your life whether it is associated with your job, schooling or a relationship. This fall from glory is dreamt for the purpose of telling the dreamers to get up, dust themselves off and keep on trying.
It is also suspected that to dream of falling stands for your feeling of being below everyone else. The dreamer is belittling or torturing conscience to self-causing a low self-esteem. This type of dream is trying to make them aware of this and show them that they need to have more confidence in themselves and become well rooted so that they will not 'fall' at the first sign of opposition. They need to stand strong.
Airplane
To see an airplane in your dream signifies your ability to solve problems, conquer hardships, and elevate yourself to a higher position of importance.
To dream that you transfer planes represents a significant change that is happening to you or will happen in the future. This alteration will lead you towards different objectives and goals than you were previously aiming for. You will receive respect and importance.
To dream that a plane crashes indicates that you need to reassess your strategies in order to achieve your objectives. Your current methods are not proving successful. Your targets are unrealistic and unattainable. In addition, the crashing airplane may reflect doubt that you will be able to reach your ambitions. You are hesitant and unsure of your ability to achieve success.
To dream that an airplane is hijacked indicates that bothersome emotions still linger from your childhood, youth, or earlier years.
Lifeboat
To see a lifeboat in your dream means that you need guidance with regards to processing your emotions. It tells of a call for help to manage situations you have no control over.
Submarine
To dream of a submarine suggests that you are discovering your inner spirituality and personality. You are reluctant to express some of your feelings to others. This dream may also be implying that you should approach a situation via an alternate route. If not, then you may want to change your views on an issue. You should carefully assess an issue before making a decision.
Dormitory
To dream that you are in a dormitory suggests the level to which you consider wisdom and education in your life. You could feel that you learn in every aspect of life. If you are residing in a dormitory at present, then you may simply be dreaming about your current situation.