The design of boats may vary from one boat to the other, but each boat has its own speed and weight distribution. It is well known that weight and speed are inversely proportional to each other. Under any circumstances the speed of the boat decreases with increase in weight. A “hill of water” is formed when a boat moves forward. Visibility decreases in this position and fuel economy goes down. In order to overcome the “hill”, Trim Tabs are used.
The stern in the boat is raised and the bow is lowered as soon as the helm control is pressed. The speed of the boat increases and optimality is obtained irrespective of the weight distribution and speed. The throttle is not touched in this process. The position of the bow of the boat is changed by the Trim Tabs in order to reduce pounding, engine laboring. Maximum comfort is reached with minimum pounding and with less engine laboring help to increase the performance, speed and consumption of fuel.
To the Transom’s bottom edge, adjustable after planes made of stainless steel, which are independent to each other, are attached. The Trim Tabs pushed into its position by pressing the helm control. An upward pressure is being created on the surface of the trim tab which raises the stern and simultaneously the bow is lowered. In Trim Tabs the principle is as simple as its working and its outcomes are more impressive.
The process of “Take Off” is as follows. The Trim Tabs should be operated in short busts so that the optimal outcome is attained. The reaction of the boat must happen prior to the consecutive adjustments. The speed and size of the boat influences the time between the corrections. Over- trimming could be prevented by this action. When the lateral trim is corrected one tab may end in too far down. The Trim tabs should be sized properly. This process reduces the time required start the plane. The bow of the boat is kept down. Even at a minimum speed that they stay on plane. The boat’s stern starts to squat when the throttle is forwarded, thereby lifting the bow. When the stern is lifted the boat reacts. Hence engine boring is reduced and the speed of the boat is increased. The steering achieves over sensitiveness when the boat is over trimmed. To ignore this kind of reactions, the control bow up is operated till the needed result is established.
The boat may exhibit a “list condition”. This condition occurs when the weight of the boat is distributed unevenly. “V” hulls formed as a result of this listing condition and it become deeper which imposes threat to the boat. Operating the boat with list conditions is not safe and comfortable. Trim Tabs are useful in correcting the list condition. The Trim Tab is lowered relative to the listing position of the boat so that the boat level is achieved. Trim tabs cannot be replaced by power trims. Hence it is not advisable to use power trims to set the attitude of the boat since it is inefficient. Power trims fails to correct listing conditions. Even at the lower speed it is inefficient. The use of propeller in the boat to move forward could be a good idea. But the propeller should also raise the stern in addition to pushing the boat. Power Trim could be used only to correct the propeller but not trimming the hull which is done with trim tabs.

The objective of using the trim tab should lie in reaching the highest performance level. This is done by adjusting the trim tab. Then, the position of the propeller should be adjusted to its correct position with the help of power trim. Engine’s RPM should be taken into account along with the boat speed to achieve best results to combine trim tabs and power trims. The bow is trimmed down when the boat is on the head sea. This helps the boat to cleave the waves with the sharp forward sections. While operating the trim tabs steps should be taken to operate it on short bursts to have minimum deflection of the tab, so that the up and down bow movement could be cured.