Non Spin/HSFClub Certificate2025
MINTUSA 1889
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Rated boat velocities in knots
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles41.9°41.9°39.2°37.0°36.2°36.3°36.0°36.1°37.5°
Beat VMG2.873.934.695.055.205.285.345.395.29
52°4.495.886.717.047.177.257.327.407.39
60°4.776.146.887.217.367.457.547.647.67
75°4.956.306.987.367.627.787.908.108.18
90°4.756.156.957.377.738.038.258.598.82
110°4.055.466.477.117.568.008.449.279.81
120°3.565.006.186.937.407.848.319.4310.76
135°3.004.325.506.437.037.457.878.8710.35
150°2.453.614.705.686.487.037.448.289.35
Run VMG2.123.124.074.935.706.406.947.738.57
Gybe Angles142.9°142.9°148.3°153.4°160.4°172.7°179.0°179.2°178.9°
APH ToD:560.1CDL: 9.290APH ToT: 1.0712CertNo:US6200
BOAT
ClassTRIPP 33DesignerTRIPPBuilderCARROLL MARINEAge date03/1993Series date04/1992Offset fileTRIPP33+.offData fileUS6200
HULL
Length Overall10.032 mMaximum Beam3.140 mDraft2.261 mDisplacement3,067 kgDLR4.5698IMS DivisionPerformanceDynamic Allowance0.090%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFolding 2 bladesDiameter0.340m
CREW
Maximum weight655 kg(declared)Minimum weight525 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension0.00 m
SAIL AREAS (m²)
MeasuredRatedMainsail34.9735.78Headsail Luffed31.8331.83Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail10.31Storm Jib7.48Heavy Weather Jib20.18
SAIL LIMITS
Headsails5
✱ Zero set flying
Spinnakers0
✱ Spinnaker pole aboard
STABILITY
Righting MomentN/AStability IndexN/A
The owner and any other person in charge is responsible that boat is complying with her certificate in accordance with RRS 78.1 and ORC Rule 304.
Non Spin/HSFClub Certificate2025
MINTUSA 1889
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Time Allowances in secs/NM
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1253.2916.6767.8712.9692.1681.7674.0668.3680.8
52°802.2611.9536.3511.2501.8496.3491.7486.6487.1
60°754.2586.3523.5499.2489.1482.9477.5470.9469.4
75°727.2571.5515.6488.9472.1463.0455.5444.7439.9
90°757.8585.2518.3488.4465.6448.2436.1419.2408.2
110°889.3659.3556.6506.0476.2449.9426.4388.4366.9
120°1012.2720.0583.0519.6486.8459.2433.1381.7334.4
135°1201.8834.0654.8560.0512.2483.1457.2405.8347.8
150°1471.2998.5765.2633.9555.5511.8483.8435.0385.0
Run VMG1698.01153.0883.6729.9631.0562.6518.5465.6420.2
Selected Courses
Windward / Leeward1473.11034.8825.7721.4661.6622.1596.2567.0550.5
All purpose1084.2784.5646.0579.5542.6518.7501.3475.3456.9
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward689.50.8702
All purpose560.11.0712
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.8214
Downwind "popa"0.8495
70% up, 30% down "Ilhabela"0.8296
30% up, 70% down "Ilhabela-inverso"0.8408
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Predominantly Upwind590.41.0163
Predominantly Downwind588.21.0201
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low715.20.8389
Triple Number AP Medium557.61.0761
Triple Number AP High495.91.2100
Triple Number Windward/Leeward Low974.40.6158
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Single Number Predominant Upwind611.10.9818
Single Number Predominant Reaching557.61.0761
Single Number Predominant Downwind617.00.9725
Predominant Upwind - Low812.50.7384
Predominant Upwind - Low/Med636.30.9430
Predominant Upwind - Medium574.61.0442
Predominant Upwind - Med/High541.81.1073
Predominant Upwind - High525.51.1417
Predominant Downwind Low929.90.6452
Predominant Downwind Low/Med675.20.8887
Predominant Downwind Medium566.61.0590
Predominant Downwind Med/High497.91.2050
Predominant Downwind High457.41.3118
Predominant Reaching Low769.30.7800
Predominant Reaching Low/Med592.51.0126
Predominant Reaching Medium522.81.1476
Predominant Reaching Med/High479.31.2518
Predominant Reaching High451.81.3279
SA/DSPL Upwind31.53SA/DSPL Downwind31.53
Scoring OptionTODTOT
5-Band Windward/Leeward Low1092.70.5491
5-Band Windward/Leeward Low/Med795.50.7542
5-Band Windward/Leeward Medium673.10.8914
5-Band Windward/Leeward Med/High601.20.9980
5-Band Windward/Leeward High569.21.0541
Windward/Leeward 60-40 Low1066.90.5624
Windward/Leeward 60-40 Low/Med788.30.7612
Windward/Leeward 60-40 Medium678.20.8847
Windward/Leeward 60-40 Med/High616.10.9738
Windward/Leeward 60-40 High589.61.0176
5-Band AP Low803.60.7466
5-Band AP Low/Med627.70.9559
5-Band AP Medium549.81.0912
5-Band AP Med/High503.31.1921
5-Band AP High476.61.2589
5-Band SF Bay Tour - Low927.90.6467
5-Band SF Bay Tour - Low/Med754.70.7950
5-Band SF Bay Tour - Medium647.80.9262
5-Band SF Bay Tour - Med/High587.11.0220
5-Band SF Bay Tour - High557.31.0765
Chicago-Mac Upwind0.9562
Chicago-Mac All Purpose0.9506
Chicago-Mac Downwind0.9337
Bayview-Mac Cove Island0.6932
Bayview-Mac Shore0.7027
Harvest Moon Regatta488.01.2296
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance611.0
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating611.00.9820
FinRating, kevyt tuuli1077.20.9283
FinRating, kova tuuli478.01.0460
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.9820
Triple Number Coastal/Long Distance Low0.8389
Triple Number Coastal/Long Distance Medium1.0762
Triple Number Coastal/Long Distance High1.2100
Triple Number Windward/Leeward Low0.6450
Triple Number Windward/Leeward Medium0.8755
Triple Number Windward/Leeward High1.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
For information
General Purpose Handicap (GPH)627.9
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low715.2
Triple Number Coastal/Long Distance Medium557.5
Triple Number Coastal/Long Distance High495.9
Triple Number Windward/Leeward Low930.2
Triple Number Windward/Leeward Medium685.3
Triple Number Windward/Leeward High591.7
Predominantly Upwind590.4
Predominantly Downwind588.2
Predominantly Reaching553.0
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8389
Triple Number Coastal/Long Distance Medium1.0762
Triple Number Coastal/Long Distance High1.2100
Triple Number Windward/Leeward Low0.6450
Triple Number Windward/Leeward Medium0.8755
Triple Number Windward/Leeward High1.0140
Coastal/Long Distance0.9820
Predominantly Upwind1.0163
Predominantly Downwind1.0201
For information
General Purpose Handicap (GPH)627.9
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)1.0712
Distanseseilas Trippeltall svak vind0.8389
Distanseseilas Trippeltall mellomvind1.0762
Distanseseilas Trippeltall sterk vind1.2100
Pølsebane Trippeltall svak vind0.6450
Pølsebane Trippeltall mellomvind0.8755
Pølsebane Trippeltall sterk vind1.0140
Motvind Singeltall1.0163
Medvind Singeltall1.0201
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Coastal/Long Distance611.00.9820
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind590.41.0163
Predominantly Downwind588.21.0201
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore555.41.0802
Cape Doctor Coastal462.41.2976
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8389
Triple Number Coastal/Long Distance Medium1.0762
Triple Number Coastal/Long Distance High1.2100
Triple Number Windward/Leeward Low0.6450
Triple Number Windward/Leeward Medium0.8755
Triple Number Windward/Leeward High1.0140
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8389
Triple Number Coastal/Long Distance Medium1.0762
Triple Number Coastal/Long Distance High1.2100
Triple Number Windward/Leeward Low0.6450
Triple Number Windward/Leeward Medium0.8755
Triple Number Windward/Leeward High1.0140
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Predominantly Upwind590.41.0163
Predominantly Downwind588.21.0201
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance611.00.9820
Triple Number Coastal/Long Distance Low715.20.8389
Triple Number Coastal/Long Distance Medium557.51.0762
Triple Number Coastal/Long Distance High495.91.2100
Triple Number Windward/Leeward Low930.20.6450
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1605.51046.6780.1652.2578.6538.4506.8453.9431.2
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low715.20.8389
Triple Number AP Medium557.61.0761
Triple Number AP High495.91.2100
Triple Number Windward/Leeward Low974.40.6158
Triple Number Windward/Leeward Medium685.30.8755
Triple Number Windward/Leeward High591.71.0140
Single Number Predominant Upwind611.10.9818
Single Number Predominant Reaching557.61.0761
Single Number Predominant Downwind617.00.9725
Predominant Upwind - Low812.50.7384
Predominant Upwind - Low/Med636.30.9430
Predominant Upwind - Medium574.61.0442
Predominant Upwind - Med/High541.81.1073
Predominant Upwind - High525.51.1417
Predominant Downwind Low929.90.6452
Predominant Downwind Low/Med675.20.8887
Predominant Downwind Medium566.61.0590
Predominant Downwind Med/High497.91.2050
Predominant Downwind High457.41.3118
Predominant Reaching Low769.30.7800
Predominant Reaching Low/Med592.51.0126
Predominant Reaching Medium522.81.1476
Predominant Reaching Med/High479.31.2518
Predominant Reaching High451.81.3279
SA/DSPL Upwind31.53SA/DSPL Downwind31.53
Scoring OptionTODTOT
5-Band Windward/Leeward Low1092.70.5491
5-Band Windward/Leeward Low/Med795.50.7542
5-Band Windward/Leeward Medium673.10.8914
5-Band Windward/Leeward Med/High601.20.9980
5-Band Windward/Leeward High569.21.0541
Windward/Leeward 60-40 Low1066.90.5624
Windward/Leeward 60-40 Low/Med788.30.7612
Windward/Leeward 60-40 Medium678.20.8847
Windward/Leeward 60-40 Med/High616.10.9738
Windward/Leeward 60-40 High589.61.0176
5-Band AP Low803.60.7466
5-Band AP Low/Med627.70.9559
5-Band AP Medium549.81.0912
5-Band AP Med/High503.31.1921
5-Band AP High476.61.2589
5-Band SF Bay Tour - Low927.90.6467
5-Band SF Bay Tour - Low/Med754.70.7950
5-Band SF Bay Tour - Medium647.80.9262
5-Band SF Bay Tour - Med/High587.11.0220
5-Band SF Bay Tour - High557.31.0765
Chicago-Mac Upwind0.9562
Chicago-Mac All Purpose0.9506
Chicago-Mac Downwind0.9337
Bayview-Mac Cove Island0.6932
Bayview-Mac Shore0.7027
Harvest Moon Regatta488.01.2296
Non Spin/HSFClub Certificate2025
MINTUSA 1889
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassTRIPP 33Measurement04/06/1993HIN125Plan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA10.032Max. Beam3.140Draft2.261Displacement3,067Wetted area19.76IMS L9.271LSM08.755Acc. length10.032Sink (kg/mm) 15.07
VCGD0.037VCGM0.053RM Rated (kg·m) 72.6Limit of positive stability(°) N/AStability IndexN/ADefault crew weight569Declared crew weight655
PROPELLER
Propeller TypeFolding 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.340PBW0.000PIPA0.0025
PSD0.024PHD0.040PHL0.137
PSA16.5°ESL0.841
ST10.024ST20.101ST30.000
ST40.040ST50.158
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays1CheckstaysSpreaders2Rotating mastNo
P12.485IG12.146ISP12.970MDT10.098MDL10.152MDT20.091MDL20.107TL1.768MW0.158GO0.180
E4.715J3.380BAS1.512FSD0.028SFJ0.189SPL3.470WPLTPS0.000BD0.158MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered73.3Flotation Date04/05/2018
BALLAST
TANKS
IdDescriptionCapacityLCGVCGSp.WghtLevel
Sailing
6.180.000.9000
INVENTORY
IdDescriptionWeight SailingLCGVCGGAIdDescriptionWeight SailingLCGVCGGAa0.00   
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG0.9000486.180.00Total deductible436.180.00
OTHER ITEMSIdKindDescriptionWeightLCGVCGaAnchor00.00Total deductible0
Non Spin/HSFClub Certificate2025
MINTUSA 1889
US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment29694960.160.961.783.033.9634.972020MAIN_3dL
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment29694840.050.671.292.583.895.2012.26NoNo 31.832020GENOA_3di