The VEEM Gyro unit(s) specified for your vessel are dependant on the operational ‘Profile’ that realistically reflects your intended vessel operation and your expectations of rolling motion attenuation in different weather conditions. VEEM Gyro installation options recommended by GyroSize will vary significantly according to the operational ‘Profile’ you specify.
Profile 1: Sheltered Water
SEA STATE 2 : WAVES TO 0.5 M
Selecting operational Profile 1 is suitable for those yachts that intend to utilise sheltered anchorages and want annoying rolling motion in these protected areas to be eliminated.
Some roll motion attenuation will be provided while the yacht is underway, but a higher wave Profile should be selected if this is a priority. It is definitely safe to operate the gyro while underway.
Profile 1 is also suitable for yachts that are already fitted with traditional or zero speed fins, but want improved roll stabilization when the vessel is at rest, and additional stabilization force when underway.
One of the unique advantages of gyro stabilizers is that they will work in unison with other motion control systems, without interference. This makes retro-fitting a gyro stabiliser in addition to existing fins a completely straight forward task as there is no need to interface the fin control system to the gyro or vice versa. The gyro can be run as a stand-alone solution when not underway, or it can be run at all times. The good news is that when the vessel is underway, the gyro will noticeably improve the performance of the existing fins, as both systems run in tandem. Profile 1 assumes that the gyro is being fitted primarily to improve roll stabilisation of the vessel at rest – typically in the small waves of anchorages.
Profile 2: Coastal Water
SEA STATE 3 : WAVES TO 1.25 M
Profile 2 is appropriate for those yachts that typically entertain in good boating weather conditions or in relatively sheltered bays or harbours, and want annoying rolling motion eliminated.
It can be immensely frustrating when even the smallest underlying swell results in your yacht rolling uncomfortably. This can occur in even sheltered areas as swell wraps around a headland, comes over a reef at high tide, or funnels through a harbour entrance. Equally, an afternoon breeze generating small wind chop can spoil a fantastic day if this results in an uncomfortable rolling motion.
Small waves or almost imperceptible swell can excite large vessel rolling angles if the wave period is close to the natural rolling period of the yacht. Unfortunately, many yachts do tend to have natural roll periods that coincide with afternoon breeze driven wave periods. In this case these small waves can have a surprisingly unpleasant effect. There are also those perfect days with glassy conditions that appear to be completely calm, but inexplicably, your yacht is rolling uncomfortably. This is due to the fact that rolling motion is predominantly a harmonic response, so that once rolling starts it can grow to annoying levels with very little excitation. The great news is that this motion is exactly what gyros are fantastic at preventing.
In any of the above conditions, annoying rolling motion can be virtually eliminated with a Profile 2 specification.
A Profile 2 specification is suitable for small wave conditions at zero speed and low speeds. Excellent roll angle attenuation is expected in waves with significant wave up to 1.75m. In waves larger than this the gyro will continue to reduce rolling motion, but the level of roll attenuation will gradually reduce as the wave heights increase.
Profile 3: Open Water
SEA STATE 3 : WAVES TO 2.50 M
A Profile 3 specification is suitable for yachts that often entertain guests outside sheltered waters, and want to continue to enjoy a comfortable experience.
Everyone has experienced the uncomfortable increase in rolling motion when a yacht is at rest in waves. For those who want to play with water toys, dive or swim for the yacht outside of protected waters, whilst keeping those on the yacht absolutely comfortable, this is now possible with compromise. And of course since there are absolutely no appendages extending outside of the hull, swimmers and divers are completely safe while the gyro stabilizer is operating. The yacht will simply sit comfortably as waves roll under her.
Profile 3 is suitable for yachts requiring improved comfort during transits between
anchorages. This Profile is also suitable for yachts requiring true comfort in less protected anchorages like outer harbours or cruise destinations not offering an enclosed harbour.
Excellent roll angle attenuation can be expected in waves up to 2.5m. For yachts with a more adventurous schedule that includes some nights out of harbour areas, this Profile specification is definitely for you.
Profile 4: Blue Water/Ocean Explorer
SEA STATE 5+ : ROUGH
A Profile 4 specification is suitable for the adventurous yacht owner/charterer who plans expedition style cruises, or intends to live aboard comfortably year round. A Profile 4 specification will ensure that excellent roll stabilization is provided even in rough wave conditions, and at all operating speeds.
Excellent roll angle attenuation can be expected in waves with significant wave heights of up to 5.0m plus. As wave height increases, the percentage roll attenuation reduces as the wave forces exceed the capacity of the gyro to counteract them. However roll
stabilization will continue to be provided in larger wave conditions due to the robust construction of the VEEM Gyro and the Smart Torque control system which monitors and controls excessive internal loads within the gyro. Adventurers understand that it is important the stabilizer works for the vessel when you need it most.
Of course a gyro stabilizer is not a replacement for prudent decision making about safe operating conditions. While gyro stabilizers are designed to improve comfort, they will not miraculously make a small vessel safe to operate in storm seas.
For yachts that are used for extended ocean cruising and frequently in remote regions where protection from waves is limited, annoying rolling motion can be virtually
eliminated with a Profile 4 specification.